Make a study of minimum amount of basic nutrients needed for a 12-year-old child to survive in the world

Answers

Answer 1

Basic nutrients a 12-year-old needs are:

ProteinCarbohydratesFatsCalciumIronFolate FiberVitamin AVitamin C

What are nutrients?A nutrient is a material that an organism requires in order to survive, grow, and reproduce. Animals, plants, fungi, and protists are all required to consume dietary nutrients. Nutrients can be absorbed by cells for metabolic reasons or expelled by cells to form non-cellular structures such as hair, scales, feathers, or exoskeletons. Some nutrients, such as carbohydrates, lipids, proteins, and fermentation products (ethanol or vinegar), can be metabolically reduced to smaller molecules in the process of generating energy, resulting in the end products of water and carbon dioxide.

The following are the nine nutrients that a youngster should consume on a daily basis:

ProteinCarbohydratesFatsCalciumIronFolate FiberVitamin AVitamin C

Therefore, basic nutrients a 12-year-old needs are given.

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Related Questions

There are some nickels, dimes, and quarters in a large piggy bank. For every 2 nicke × there are 3 dimes. For every 2 dimes there are 5 quarters. There are 500 coins total.
a. How many nickels, dimes, and quarters are in the piggy bank?

Answers

Answer:120 dimes, 80 nickels, and 300 quarters

Step-by-step explanation: Go step by step multiplying

19) Solve for "x" using an inverse operation.

3x = 48

20) Solve for "x" using an inverse operation.

4x = 64

Answers

The value of x in the equation 3x = 48 is 16 and for equation 4x = 64 is 16.  

What is equation ?

A mathematical expression with an equals sign is referred to as an equation. Algebra is widely used in equations. When performing calculations but unsure of the precise amount, algebra is used. A lot of specialists, such as air traffic controllers, architects, computer programmers, and carpenters, employ equations on a daily basis.

The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.

A mathematical statement known as an equation is made up of two expressions joined together by the equal sign.

3x = 48

As it is multiplication we divide it by 3

3x / 3 = 48 / 3

x = 16

4x = 64

As it is multiplication we divide it by 4

4x / 4 = 64 / 4

x = 16

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Calculate the geometric mean return of the following data set: (Negative value should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places and final answer to 2 decimal places.)

Answers

The geometric mean return of the given data set is 0.02.

The geometric mean return measures the compound rate of return over a period of time. It is calculated by taking the product of all the returns and then taking the nth root of the product, where n is the number of returns.

Formula: GMR = ((1+r1)(1+r2)…(1+rn))^1/n – 1

In this case, the data set is as follows:

r1 = 0.05

r2 = 0.03

r3 = -0.02

Using the formula above, the geometric mean return is calculated as:

GMR = ((1+0.05)(1+0.03)(1-0.02))^1/3 - 1

GMR = ((1.05)(1.03)(0.98))^1/3 - 1

GMR = (1.1394)^1/3 - 1

GMR = 0.0204

Therefore, the geometric mean return of the given data set is 0.02.

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simplify to radical form the square root of 40 and then divide by 6

Answers

The simplified expression of the radical is √10/3

How to evaluate the expression

From the question, we have the following parameters that can be used in our computation:

the square root of 40 and then divide by 6

This statement can be mathematically represented as

√40/6

Simplify the numerator

So, we have the following representation

2√10/6

Divide 2 and 6

√10/3

Hence, the solution is √10/3

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What is dilating by a scale factor?

Answers

The dilation transformation is determined by the scale factor and the centre of dilation. The image stretches when the scaling factor exceeds 1. When the scale factor is between 0 and 1, the image gets smaller.

What is scale factor of dilation?Ratio of scale (Dilation) How much larger or smaller the image will be depends on the scale factor in a mathematical object's dilatation (compared to the original object). When the scaling factor's absolute value exceeds 1, an expansion takes place.The x and y values of each point will be multiplied by 2 to enlarge the graphic by a factor of 2. To identify the new triangle, I plotted each new point. The x-value of each point will be multiplied by 2 to enlarge the image by a factor of two.A scale factor is defined as the ratio of an original object's scale to that of a new, smaller version of the original object.

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The dilation transformation is determined by the scale factor and the center of dilation. The image stretches when the scaling factor exceeds 1. When the scale factor is between 0 and 1, the image gets smaller.

What is scale factor of dilation?

Ratio of scale (Dilation) How much larger or smaller the image will be depends on the scale factor in a mathematical object's dilatation (compared to the original object). When the scaling factor's absolute value exceeds 1, an expansion takes place.

The x and y values of each point will be multiplied by 2 to enlarge the graphic by a factor of 2. To identify the new triangle, I plotted each new point. The x-value of each point will be multiplied by 2 to enlarge the image by a factor of two.

A scale factor is defined as the ratio of an original object's scale to that of a new, smaller version of the original object.

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Dawson Christian Academy have 1200 people attend a music festival on either Friday or Saturday night if 60% attended Friday night how many people attended Friday night

Answers

There are 720 people (60 percent) attended a music festival on Friday night in Dawson Christian Academy.

What is the percentage?

A percentage is a figure or ratio that shows a portion of one hundred. A dimensionless relationship between two numbers can be represented in a variety of ways, such as through ratios, fractions, and decimals. The symbol "%" is frequently written after the number to indicate percentages. Additionally, you can indicate them by adding "percent" or "pct" after the number.

Given that Dawson Christian Academy have people to attend a music festival is 1200

out of these people to attend a music festival on friday is 60%

No. of people to attend a music festival on friday is 60% of 1200

⇒ (60/100)*1200

⇒ 0.60*1200

⇒ 720 people

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For what value of k do the equation 3x 8y 0 and 6x Ky =- 16 represent coincident lines?

Answers

For what value of k = -48 the equation 3x 8y 0 and 6x Ky =- 16 represent coincident lines.

The equation 3x + 8y = 0 and 6x + Ky = -16 represent coincident lines when the two lines are identical, or when their slope and y-intercept are the same.

To find the value of k for which this is true, we can set the two equations equal to each other and solve for k.

3x + 8y = 0

6x + Ky = -16

The equation 3x + 8y = 0 represents the slope-intercept form of a line, where the slope is -3/8 and the y-intercept is 0.

The equation 6x + Ky = -16 represents the general form of a line, where the slope is -K/6 and the y-intercept is -16/K.

To find the value of k for which the two lines are identical, we need to make the slopes and y-intercepts equal.

-3/8 = -K/6

0 = -16/K

Solving for K, we get:

K = -48

So the lines are coincident when K = -48

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Help please! Brainly?

Answers

Answer:

-8/4 or -2

Step-by-step explanation:

First of all notice the graph is negative. Meaning that this will be a negative slope.

Now we can use rise over run, counting up 8 spaces, and to the left 4.

Since the graph is negative make the rise negative. -8/4.

To simplify this fraction divide -8 by 4, and receive an answer of -2.

-Hope this helped

I need help with this! L, M belong on line KN

Answers

The value of x in the triangle is 38 degrees.

How to find angles in a triangle?

A triangle is a polygon with three sides. The sum of angles in a triangle is 180 degrees.

The exterior angle theorem states that the measure of an exterior angle is equal to the sum of the measures of the two remote interior angles of the triangle.

The exterior angle theorem can be used to find the angle x in the triangle.

Hence,

x + (180 - 84) = 134

x + 96 = 134

subtract 96 from both sides of the equation

x = 134 - 96

Therefore,

x = 38 degrees

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Answer: x=38

Step-by-step explanation:

x=38

HELP QUICK!!
The Top-Notch Middle School had athletes from all the grades playing on a sports team.


6th grade 7th grade 8th grade
Basketball 2 4 7
Baseball 1 6 5
Soccer 7 4 4
Football 8 15 10


Explain what the ratio 5:73 represents.
The ratio 5:73 represents the ratio of 8th grade baseball players to total athletes.
The ratio 5:73 represents the ratio of 7th grade football players to total athletes.
The ratio 5:73 represents the ratio of total athletes to 7th grade football players.
The ratio 5:73 represents the ratio of 6th grade athletes to total athletes.

Answers

The ratio 5:73 represents A. The ratio 5:73 represents the ratio of 8th grade baseball players to total athletes.

What is the ratio about?

Ratio in Mathematics simply demonstrates how many times one number can be able to fit into another number. It should be noted that ratios contrast two numbers by dividing them. In this case, A/B will be the formula if one is comparing one variable (A) to another variable (B).

Number of 8th grade baseball players = 5

Total number of athletes = 73

Therefore the ratio will be:

= 5 / 73

= 5:73.

The correct option is A

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The triangles are similar. What is the value of x? enter your answer in the box. X = two right triangles. The larger right triangle is labeled x on the longer leg, 12 on the shorter leg and 20 on the hypotenuse. The smaller triangle is labeled 4 on the longer leg, 3 on the shorter leg, and 5 on the hypotenuse.

Answers

The value of x is 16 units.

The triangles which are alike have the same shape and the measure of the three angles are also the same. The only thing which varies is their edges.  However, the ratio of the sides of one triangle is equivalent to the ratio of the sides of another triangle, that is called the scale factor.

we know that

If two triangles are similar, then the ratio of their corresponding sides is equal and is called the scale factor.

According to the question,

The larger right triangle of the longer leg is x units.

so,

[tex]\frac{12}{3} = \frac{x}{4}[/tex]

⇒ [tex]x = \frac{12 * 4}{3}[/tex]

∴x = 16

Therefore, the value of x is 16 units.

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A company launches two new products. The market price, in dollars, of the two products after a different number of years, x, is shown in the following table

Based on the data in the table, for which product does the price eventually exceed all others, and why? (1 point)

Product 1, because the function is exponential

Product 2, because the function is exponential

Product 1, because it has a greater start value

Product 2, because it has a greater Year 3 value

Answers

Answer:

Product 1, because the function is exponential

Step-by-step explanation:

An exponential function, such as f(x) = 3^x, grows very quickly.

Answer: Product 1, because the function is exponential

What are the lines of longitude also called as Class 6?

Answers

Longitudes: The vertical lines running north-south, join the two poles. They are called the meridians of longitude. They are spaced farthest apart at the equator and converge at a point at each pole.

Horizontal lines called latitudes are used to measure distances north or south of the equator. Vertical lines known as longitudes are used to determine the west or east of the meridian in Greenwich, England. Latitude and longitude work together to help cartographers, geographers, and others find specific locations on the globe.

What is the uses of latitude?

Any location's distance from the equator may be determined using its latitude, which is based on its degree. We can locate any point on Earth using longitude and latitude. The GPS or Global Positioning System uses these coordinates.

The grid system that enables us to locate absolute or precise places on the surface of the Earth is made up of latitude and longitude. Latitude and longitude can be used to pinpoint certain locations. Landmark identification also benefits from knowledge of latitude and longitude.

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How many inches of the width of the box

Answers

The width of the box is 4 inches wide

How to determine the number of inches of the width

From the question, we have the following parameters that can be used in our computation:

Area = 20 square inches

Height = 5 inches

The width of the box can be calculated using the following equation

Width = Area/Height

substitute the known values in the above equation, so, we have the following representation

Width = 20/5

Evaluate the quotient

Width = 4

Hence, the width is 4 inches

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Complete question

The side of a box has an area of 20 square inches and a height of 5 inches. How many inches is the width of the box?

Find the y-value that will make the equations below true by
graphing the lines on a coordinate plane and determining
where they intersect.
3x + y = -3
-2x + y = 2

NEED DONE BY 5:PM!!

Answers

Answer:

(-1,0)

Step-by-step explanation:

See attached graph.  Use a free site such as DESMOS for graphing.

The endpoints of directed line segment DC are C(-10,6) and D(-2,18).

Answers

The coordinate of the point that partitions the line segment is; (-4, 15)

How to partition line segment?

We are given the line DC with coordinates as;

C(-10, 6) and D(-2, 18)

Now the formula to find the coordinates of a partitioned line segment in the ratio a:b is;

(x, y) = (bx₁ + ax₂)/(a + b), (by₁ + ay₂)/(a + b)

From the ratio given to us, we can say that a = 1 and b = 3. Thus;

(x, y) = ((3*-2) + (1*-10))/(1 + 3), ((3*18) + (1*6))/(1 + 3)

(x, y) = (-16/4), (60/4)

(x, y) = (-4, 15)

This is the coordinate of the point that partitions the line segment.

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Help me quick please

Answers

Answer:

y = 3x + 2

Step-by-step explanation:

1. Work out the gradient of the line segment: change in y/change in x: -2 - -6/ -8 - 4 = 4/-12 = -1/3

2. Work out the gradient of the perpendicular bisector: the gradient of the line segment and the perpendicular bisector should multiply to get -1. This means that we can do -1 ÷ -1/3 to work out the gradient which is 3

4. Find the midpoint of the line segment: (-8 + 4) ÷ 2 = -2, and (-2 + -6) ÷ 2 = -4, so the midpoint is (-2, -4)

3. The equation will be in the format y = 3x + c and will go through (-2, -4), so we can substitute those values into the equation to find c:

y = 3x + c-4 = 3(-2) + c-4 = -6 + cc = -4 + 6c = 2

The equation of the line is y = 3x + 2

Hope this helps!

How do you write an inequality step by step?

Answers

An inequality in mathematics shows how two values are related in an imbalanced algebraic expression.

What is meant by inequality?

In mathematics, an inequality displays the connection between two values in an unbalanced algebraic statement. One of the two variables on the two sides of the inequality may be greater than, greater than or equal to, less than, or less than or equal to another value, according to inequality signals.

There are four ways to depict an inequality: solution graph, interval notation, set notation, and equation notation.

A comparison of any two values, known as an inequality, demonstrates whether one value is less than, larger than, or equal to the value on the opposite side of the equation. A relationship in a real-world scenario can be demonstrated by writing an inequality.

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It is a property of exponents that if ax = ay and a is not 0 or 1, then x = y. You used this property to solve the equation in Question 1. Now use this same property to solve the equation 3x = 729 by rewriting to get a common base number

Answers

Using the property of exponents, the value of x for the formula 3x=729 is 6.

What is exponents?

The number of times a number is multiplied by itself is referred to as its exponent. For instance, 2 to the third (written as 23) means: 2 x 2 x 2 = 8. 2 x 3 = 6 does not equal 23. Keep in mind that a number raised to the power of one is itself. Exponentiation is the process of expressing huge numbers in terms of powers. That is, exponent refers to the number of times a number has been multiplied by itself. For example, 6 is multiplied by itself four times, yielding 6 6 6 6. This is written as 64. The exponent is 4 and the base is 6.

Here,

3ˣ=729

3ˣ=3⁶

x=6

The value of x for expression 3ˣ=729 is 6 using property of exponents.

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Why 5 Is it possible to construct a triangle with lengths of its sides as 4 cm 3 cm and 7 cm give reason for your answer?

Answers

It is not possible to construct a triangle with the given lengths (4,3,7).

A triangle is a polygon. It has three sides and three vertices. It is one of the famous shapes in geometry. A triangle has three vertices A, B, and C, and is denoted ΔABC.

Triangle Inequality Theorem :

The summation of the lengths of any two sides of a triangle is greater than the length of the third side.

Given three sides are 4,3,7cm

We know that the summation of two sides of a triangle is greater than the third side.

But given sides, 4+3=7 ( using addition)

Hence, it is not likely to construct a triangle with lengths of sides 4cm, 3cm, and 7cm.

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How much is the cost per ticket?

Ride Tickets Cost

5 $7.50

7 $10.50

9 $13.50

10 $15.00

Answers

$1.5 per ticket

Explanation: $7.50/5tickets so 7.50/5=1.5 10.50/7=1.5 13.50=1.5

a cabinet holds shelves that are 12 1/2 inches apart. On one shelf, Katherine stacked a CD player that is 4 5/8 in. high on top of an amplifier that is 6 3/4 in. high. How much space was left above the CD player?

Answers

The space left above the CD player of height 4 5/8 in. stacked on the amplifier of height 6 3/4 in. in the cabinet which has shelves of 12 1/2 in. apart calculated as mixed fractions is 1 1/8 inches.

What is a mixed fraction?

A mixed fraction is a fraction that is specified using the value of the quotient (the whole number part) and a fraction consisting of the remainder divided by the divisor.

The distance between the shelves of the cabinet = 12 1/12 inches

The height of the amplifier on a shelve of the cabinet on top of which Katherine stacks the CD player = 6 3/4 inches

The height of the CD player placed on top of the amplifier = 4 5/8 inches

The dimensions of the distance between the shelves and the heights of the CD player and amplifier are specified in fractions.

The space left above the CD player can be found in fractions as follows;

The combined height of the CD player and the amplifier is therefore;

[tex]H = 4\frac{5}{8} +6\frac{3}{4} = (4 + 6) + \left(\dfrac{5}{8}+\dfrac{3}{4} \right)[/tex]

[tex](4 + 6) + \left(\dfrac{5}{8}+\dfrac{3}{4} \right)=10 + \left(\dfrac{5+2\times 3}{8} \right) = 10 + \dfrac{11}{8}[/tex]

[tex]10 + \dfrac{11}{8} = 10 + 1\dfrac{3}{8} = 11\frac{3}{8}[/tex]

The space above the CD player is therefore;

[tex]12\frac{1}{2} - 11\frac{3}{8} = 12 - 11 + \left(\dfrac{1}{2} - \dfrac{3}{8} \right) = 1 + \left(\dfrac{4 - 3}{8} \right)[/tex]

[tex]1 + \left(\dfrac{4 - 3}{8} \right) = 1\frac{1}{8}[/tex]

The space left above the CD player is 1 1/8 inches

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M. Nichol’ cla i having a dicuion about Greek mythology. One tudent ay, "The influence of the godde Demeter can be found throughout Greek hitory and culture. She i the godde of the harvet a well a the cycle of life. " Which would be an appropriate follow-up quetion to ak thi tudent?

Answers

an appropriate follow-up quetion to ak thi tudent is the culture

M. Nichol’ cla i having a dicuion about Greek mythology.. She i the godde of the harvet a well a the cycle of life.

What is the follow-up question to be asked?

M. There are four basic theories of myth. Those theories are: the rational myth theory, functional myth theory, structural myth theory, and the psychological myth theory.. Nichol’ cla i having a dicuion about Greek mythology.

What are the 3 biggest Greek gods?

Especially the “big three”. Zeus, Poseidon, and Hades.

an appropriate follow-up quetion to ak thi tudent is the culture

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What is the value of x? round to the nearest tenth, if necessary. responses x = 6 x, = 6 x = 11 x, = 11 x = 11.5 x, = 11.5 x = 13.6

Answers

Round to the nearest tenth , if necessary the value of x is 11.5.

What is right triangle ?

A right triangle is a type of triangle in which one angle is equal to 90 degrees. The side opposite this 90-degree angle is known as the hypotenuse, and the other two sides are known as the legs. The Pythagorean theorem, which states that the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs, applies to all right triangles.

Triangle ABC is a right angle triangle,

We can apply the Pythagorean Theorem to get,

[tex]x^{2} +8^{2} = 14^{2} \\x^{2} = 14^{2}-8^{2} \\x^{2} = 196-64\\x^{2} =132[/tex]

x ≈ 11.5

So , Round to the nearest tenth , if necessary the value of x is 11.5.

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Is 3x³ a polynomial?

Answers

So on solving the provided question we can say  that 3x³ is a polynomial as it have exponential power

what are polynomials?

A mathematical expression made up of coefficients and uncertainty that only makes use of additions, subtractions, multiplications, and positive integer powers of variables is known as a polynomial. The formula x2 4x + 7 denotes a single indeterminate x polynomial. An expression in mathematics known as a polynomial is made up of variables (also known as indeterminates) and coefficients that may be added, subtracted, multiplied, and raised to negative integer powers of non-variables. An algebraic statement with variables and coefficients is called a polynomial. An expression can only contain the operations addition, subtraction, multiplication, and non-negative integer exponents. Polynomials are the name for these expressions.

here,

3x³ is a polynomial

as it have exponential power

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m=-2/3b=-4 Write in slope intercept form, solve, graph

Answers

The equation for a slope of -2/3 and an intercept of -4 is 2x+3y+12=0.

What is equation?

In its most basic form, an equation is a mathematical statement that indicates that two mathematical expressions are equal. 3x + 5 = 14, for example, is an equation in which 3x + 5 and 14 are two expressions separated by a 'equal' sign. A mathematical statement made up of two expressions joined by an equal sign is known as an equation. 3x - 5 = 16 is an example of an equation. We get the value of the variable x as x = 7 after solving this equation. Linear equations are classified into three types: point-slope, standard, and slope-intercept.

Here,

y=mx+b

m=-2/3

b=-4

y=-2/3x+(-4)

y=-2x/3-4

3y=-2x-12

2x+3y+12=0

The equation for slope given as -2/3 and intercept as -4 is 2x+3y+12=0.

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Juanita has saved 20% of the money that she needs to buy a new bicycle If she has saved $36 how much money does the bycycle cost

Answers

Answer:

$180

Step-by-step explanation:

20*5=100

36*5=180

Answer: the cost of the bicycle is 180$

Step-by-step explanation:

If Juanita has saved 20% of the money she needs to buy a new bicycle and she has saved $36, we can calculate the cost of the bicycle using the following formula:

(100% - 20%) x cost of bicycle = $36

To find the cost of the bicycle, we can divide both sides of the equation by 80% (100% - 20%), like this:

cost of bicycle = $36 / (100% - 20%)

We know that Juanita has saved $36 and the percentage saved is 20% , so the cost of the bicycle is $180

HELP PLSS!! Find cos (A) given the triangle!!

Answers

Answer:

77.3

Step-by-step explanation:

Cos = Adjacent/Hypotenuse

Adjacent = 2.25 & Hypotenuse = 10.25

So that means...

Cos = 2.25/10.25

*When you type in the calculator type Cos-1 (2.25/10.25).

The answer is 77.319....

When you round it, it would become 77.3°.

Hope it's helpful.

What is the formula of image of a line?

Answers

The formula of the image of a line is( l−p)/a = (m−q)/b = -2(ap+bq+c)/√a²+b²

What is the image of a line?

Typically, a little dash is used to identify a point's reflection, such as A'. This is said with a "prime." As a result, line AB's reflection is known as A'B'. The reflection is referred to as line AB's "image."

Here,

We have to determine the formula of the image of a line.

We concluded that

The mirror's "reflection" of the specified point P causes it to appear at an equal distance away on the opposite side of the line. To see this, move point P. According to tradition, the "image" of point P is the reflection of point P across the line, which is designated by the term P' (pronounced "P prime").

Hence, the formula of the image of a line is( l−p)/a = (m−q)/b = -2(ap+bq+c)/√a²+b²

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someone please helppp

Answers

The shape forms a pentagon. The value of y is  84°.

What is a polygon?

In geometry, a polygon is any closed curve made up of a series of line segments (sides) joined so that no two segments cross. Triangles (three sides), quadrilaterals (four sides), and pentagons are the simplest polygons (five sides).

The shape ABCDE forms a petagon.

The interior angle of a pentagon is 108°

The interior angle of a hexagon is 120°.

The ∠ABC is an angle of a regular hexagon, thus ∠ABC = 120°.

The ∠BCD is the angle of a regular hexagon, thus ∠BCD =120°.

The ∠BAE is an angle of a regular pentagon, thus ∠BAE=108°.

The ∠AED is an angle of a regular pentagon, thus ∠AED=108°.

The sum of all interior angle of a pentagon is 540°

Therefore,

∠ABC + ∠BCD + ∠BAE + ∠AED +∠EDC = 540°

120° + 120° + 108° + 108° + y = 540°

456° + y = 540°

y =  540° - 456°

y = 84°

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I have not gone to school in a month for family reasons and I have to submit 39 math assignments before Friday HELP 1-True or False? IEEE 802.11 is the standard for low-power commercial radios in wireless personal networks.Group of answer choicesTrueFalse Thermodynamics: Potassium Nitrate Dissolving in Water Introduction When potassium nitrate (KNO3) dissolves in water, it dissociates into potassium ions Ky and nitrate ions (NO3-). Once sufficient quantities of K+ and NO3' are in solution, the ions recombine to form solid KNO3. Eventually, for every pair of ions that forms, another pair recombines. As a result, the concentrations of these ions remain constant; we say the reaction is at equilibrium. The solubility equilibrium of KNO3 is represented by the equation KNO:(s) = K (aq) + NO: (aq) where opposing arrows indicate that the reaction is reversible. We call this system, with undissolved solid that is in equilibrium with its dissolved ions, a saturated solution. We can describe the saturated solution with its fixed concentrations of ions with an equilibrium constant expression. Ksp = [K+] [NO:] The sp stands for solubility product and the square brackets around the ions symbolize molar concentrations in moles/liter (M). The equation serves as a reminder that the equilibrium constant not only is concerned with solubility but also is expressed as a product of the molarities of respective ions that make up the solid. The Ksp values can be large (greater than 1) for very soluble substances such as KNO3 or very small (less than 10-10) for insoluble compounds such as silver chloride. Further, as the solubility of a compound changes with temperature, its Ksp values change accordingly because Ksp is, likewise a function of temperature. Thermodynamics We use thermodynamics to understand how and why KNO3 dissolves in water. The enthalpy change, AH, for KNO3 dissolving in water provides the difference in energy between solid KNO3 and its dissolved ions. If AH is positive, heat must be added for KNO3 to dissolve. On the other hand, if AH is negative, dissolving KNO3 in water releases heat. The entropy change, AS, for KNO3 dissolving in water indicates the relative change in disorder with respect to solid KNO3. We therefore expect AS for solid KNO3 dissolving in water to be positive because there are 2 moles of ions that are being formed from the disintegration of 1 mole of KNO3. Hence 2 moles of products have more disorder compared to 1 mole of the reactants. Finally the free energy change, AG, for KNO3 dissolving in water indicates whether the process occurs spontaneously or not. If AG is negative, solid KNO3 spontaneously dissolves in water. The equilibrium constant is related to the free energy change through the equation AG =-RTINKS Recall that the free energy change is related to enthalpy and entropy through the Gibbs- Helmholtz equation AG = AH-TAS Combining the two preceding equations and algebraically rearranging them provides the following equation into the form of a straight line (y=mx+b) In Ksp =- A Therefore, a plot of InKsp vs. (9) will be linear with a slope equal to - and a y intercept value equal to . It is assumed that AH is constant and therefore independent of temperature. Pre-Lab Questions 1. What is a saturated solution? 2. Potassium chloride (KCl) dissolves in water and establishes the following equilibrium in a saturated solution: KCI K (aq) + Cl" (aq) The following Ksp data was determined as a function of the Celsius temperature. Temp (C) Ksp Temp. (K) (4) (K1) InKsp AG (J/mol) 20.0 40.0 18.5 60.0 24.8 80.0 30.5 13.3 a. Complete the entries in this table by converting temperature to Kelvin scale and calculate the corresponding values for ), InKsp and AG. b. Using an excel worksheet, plot InKsp as a function of () and display the trendline. Print the graph and tape or glue it into your notebook. c. Use the slope on the equation obtained in (b) to calculate the AH value for KCl dissolving in water. d. Calculate the value of AS at 20.0C. Using the intercept, calculate the average value of AS for the reaction. Are there any significant differences between the two AS values you have calculated? Due to decreased light penetration, which area of rivers and streams will have less diversity of plant life? a. The source b. The mouth c. The middle portion d. None of the above Please select the best answer from the choices provided A B C D. The two categories of stem cells in the human body are embryonic stem cells and adult stem cells. Therefore, stem cells can be found in 130 Multiple Choice O embryos, after division of the original zygote O Skin cells O the bone marrow assuming that the magnetic field is uniform between the pole faces and negligible elsewhere, determine the induced emf in the loop. young children should be allowed to explore and enjoy food by eating with their fingers at firstT/F many employers offer direct deposit as a convenient and cost-saving method of distributing employee pay each month.T/F The following data applies to Questions 4 to 10. A pension fund manager is considering three investment options. The first is a stock fund, the second is a corporate bond fund, and the third is a T-bill money market fund (the risk-free asset) that yields a sure rate of 5.5%. The probability distributions of the risky funds are: Expected return (%) Standard Deviation (%) Stock fund (S) Bond fund (B) The correlation between the fund returns is 0.15. 15 32 23 number these interactions in the order each first occurs in protein synthesis in bacteria. The states that if the sample size is large enough the distribution of sample means will be approximately normal even if the samples came from a population that was not normal.a. trueb. false Schroedinger equation:-\frac{h_{(bar)}^{2}}{2m}\frac{d^{2}\psi }{dx^{2}}=E\psiExpress the energy of the particle E in terms of the wavenumber of the particle k.Express your answer in terms of wave number k, mass m, and Planck's constant divided by 2pi:h(barr). Select the transformations that will carry the trapezoid onto itself. what generates revenue each time a user clicks on a link to a retailer's website? Select the incorrect comment(s) about the phospholipid bilayer Phospholipids can move from one layer to another in a membrane when the temperature changes in the cell. Fatty acid chains are sequestered to the center of the bilayer. Phospholipids orient themselves in such a way that a layer of the fatty acid chains associate with the aqueous cytosol. The phosphate region of a phospholipid is much more likely to form hydrogen bonds than the fatty acid tail region. Most phospholipids in a membrane have two fatty acid tails but some have three. The polar phospholipid head of a lipid attaches to the fatty acid tail of adjacent lipids in a membrane. CVS's issuance of corporate bonds will have what impact on its earnings per share on the date the bonds are issued? In a parallel-flow heat exchanger, hot fluid enters the heat exchanger at a temperature of 164C and a mass flow rate of 2.9 kg/s. The cooling medium enters the heat exchanger at a temperature of 59C with a mass flow rate of 0.32 kg/s and leaves at a temperature of 116C. The specific heat capacities of the hot and cold fluids are 1150 J/kg-K and 4180 J/kg K, respectively. Determine the temperature of hot fluid at exit in C upon phagocytosis of antigens, the phagocytic cell can induce a(n) 1. ............. was a strong wind yesterday. Many people ............. and cannot go home. a) There, are stranded b) Here, were stranded c) It, are stranded d) It, were stranded 000DODA Log000000AmplityBIG IDEAS MATHanced 2: BTS > Chapter 15 > Section Exercises 15.1 > Exercise 44You spin the spinner shown.392Of the possible results, in how many ways can you spin an even number? an odd number?There are ways to spin an even number.It 11 pm I need help ASAP