HELP PLEASE 20 POINTS
Describe what a solution is for a system of equations and explain how this relates to setting the equations equal to each other?​

Answers

Answer 1

Sorry, can you tell me in Spanish, I don't understand much English, I really want to help you, can you do what I told you? Thanks


Related Questions

Copy and complete the pattern in the table

Answers

The pattern in the table should be completed as follows;

Number of                      1          3        9       27        81

students with pets

Total number                  3         9        27     81        243

of students

A ratio that compares the number of blue squares to the total number of squares is 3 : 4.

What is a proportional relationship?

In Mathematics and Geometry, a proportional relationship can be modeled or represented by the following mathematical equation:

y = kx

Where:

y represents the x-variable​.x represents the y-variable.k is the constant of proportionality.

Next, we would find the constant of proportionality (k) by using various data points as follows:

Constant of proportionality, k = y/x

Constant of proportionality, k = 3/1 = 9/3

Constant of proportionality, k = 3.

y = 3x

81 = 3x

x = 27

x = 9/3

x = 3

y = 3(81)

y = 243

For the ratio of blue squares to total squares, we have:

18/24 = 3/4 = 3 : 4

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NEED THIS SOLVED ASAP!!!!!!!!!!!! I AM GIVING 15 POINTS

Arm Span (inches) / Height (inches)
58 60
49 47
51 55
19 25
37 39
44 45
47 49
36 35
41 40
46 50
58 61

Using graphing software of your choice, create a scatter plot of your data. Predict the line of best fit, and sketch it on your graph.
Copy and paste your scatter plot into a word-processing document. (Recommend me this software so I can do this part).

Using graphing software of your choice, create a scatter plot of your data. Predict the line of best fit, and sketch it on your graph.
Copy and paste your scatter plot into a word-processing document.

Answers

The scatter plot for the above data and it's line of best fit is attached accordingly. You may achieve this result using Microsoft Excel.

How to plot scatter plot on Microsoft Excel

Enter your data into two columns in an Excel worksheet. For example, in columns A and B, enter the years and corresponding life expectancies from your given data.

Select the data range by clicking and dragging over the cells containing the data.

Go to the "Insert" tab in the Excel ribbon.

In the "Charts" group, click on the "Scatter" chart type. Choose the scatter plot style that suits your preference (e.g., "Scatter with Straight Lines").

A scatter plot will be created on your worksheet.

Right-  click on any data point on the scatter plot and choose "Add Trendline" from the context menu.

In the  "Format Trendline" pane  that appears on the right side of the screen, select the "Linear"  trendline option.

Check the box for  "Display Equation on Chart" if you want to show the equation of the line of best fit on the  chart.

You can further customize the appearance of the scatter plot and the trendline using various chart formatting options in Excel.

Your scatter plot with the line of best fit is now plotted on Excel.

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Help me please! Thanks

Answers

The identification of the polygon that are given in the diagram above would be =

Polygon 1 = Isosceles trapezoid

polygon 2 = parallelogram

polygon 3 = Rectangle

polygon 4 = Rhombus

polygon 5 = Square

polygon 6 = trapezoid

What are the properties of the polynomials given above?

Isosceles trapezoid : This is the type that of polygon in which the the top and base are not equal in length, but they are parallel to each other.

Parallelogram : This is defined as the type of polygon that has two pairs of parallel sides.

Rectangle : This has two pairs of sides that are equal and opposite.

Rhombus: All the sides are equal in length with its opposite angles equal .

Square: All sides are equal in length but and all angles are equal to 90°.

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A paint machine dispenses dye into paint cans to create different shades of paint. The
amount of dye dispensed into a can is known to have a normal distribution with a mean of 5
milliliters and a standard deviation of 0.4 milliliters. Find the dye amount that represents the
99th percentile of the distribution.
Select one:
O a. 4.1 milliliters
O b. 5.9 milliliters.
O c. 4.9 milliliters
O d. 5.1 milliliters

Answers

Answer:

  b. 5.9 mL

Step-by-step explanation:

You want the value that represents the 99th percentile of a normal distribution with a mean of 5 mL and a standard deviation of 0.4 mL.

Inverse normal

The inverse of the normal CDF function is used to find the X value for a given area. Here, we want X such that P(x < X) = 0.99 for μ = 5 and σ = 0.4.

The attached calculator output shows that is about X = 5.9305. Rounded to 1 decimal place, the volume is ...

  5.9 mL

<95141404393>

50 Points! Multiple choice geometry question. Photo attached. Thank you!

Answers

Answer is B. This is because the ratio between 12 and 10 is 1.5. You find this from dividing 10 from 12. Therefore, BE is 1 and a half

pls pls help, will give brainliest answer!!

Answers

Answer:

Equation of the triangle:  (x + 74) + 73 + (37 + x) = 180°

Solve for x:  x = -2

Find the measure of angle A:  A = 35°

Step-by-step explanation:

Step 1:  We know that the 73° angle and the angle inside the triangle that lies opposite it are vertical angles ,so this angle is also 73° .

Step 2:  Similarly, the (x + 74)° angle and the angle inside the triangle that lies opposite it are also vertical angles, so this angle is also represented by the expressions (x + 74)°

Equation of the triangle:  The triangle sum theorem states that the sum of the interior angles of a triangle equals 180°.  Thus, the equation of the triangle is (x + 74) + 73 + (37 + x) = 180

Solving for x:  

Step 1:  Rearrange and combine like terms:

(x + 74) + 73 + (37 + x) = 180

(x + x) + (74 + 73 + 37) = 180

2x + 184 = 180

Step 1:  Subtract 184 from both sides:

(2x + 184 = 180) - 184

2x = -4

Step 3:  Divide both sides by 2 to solve for x:

(2x = -4) / 2

x = -2

Finding the measure of angle A:  Now we can plug in -2 for x in the expression representing the measure of angle A to find the actual measure:

A = 37 - 2

A = 35

Thus, the measure of angle A is 35°.

Optional Step:  We can check that our equation of the triangle, the value we've found for x, and the measure of angle A is correct by simply plugging in -2 for x in the equation of the triangle and checking that we get 180 on both sides:

(-2 + 74) + 73 + (37 - 2) = 180

72 + 73 + 35 = 180

145 + 35 = 180

180 = 180

Thus, all of our answers are correct.

4. Higher Order Thinking A national TV
news show conducted an online poll to find
the nation's favorite
comedian. The
website showed
the pictures of
5 comedians and
asked visitors of the
site to vote. The news
show inferred that
the comedian with
the most votes was
the funniest comedian
in the nation.


a. Is the inference valid? Explain.



b. How could you improve the poll? Explain.

Answers

No, the inference is not necessarily valid. The fact that a comedian received the most votes in an online poll does not guarantee that they are the funniest comedian in the nation.

Is the inference valid? Explain.

The poll's results are influenced by various factors such as the sample size, the demographics of the voters and potential biases in the voting process.

Also, humor is subjective and what one person finds funny may not be the same for someone else. Therefore, determining the funniest comedian based solely on the number of votes in an online poll is an oversimplified and flawed approach.

To improve the poll, several steps can be taken which are:

Increase sample sizeUse random samplingImplement multiple criteriaConduct a live event or competition.

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1. The Roth Family took out a $215,000 with a 15-year mortgage at an APR of 5.4%. The
monthly payment was $1,850. What will be their total interest charges after 15 years?

Answers

The total interest charges to the Roth Family, after 15 years, given the monthly payment would be $ 118, 000

How to find the total interest charges ?

First, find the total amount paid over the 15 years by the Roth Family to be :

= Number of years x Monthly payment x Number of months per year

= 15 x 1, 850 x 12

= $ 333, 000

The total interest charges that the Roth Family paid would be :

= Total amount paid after 15 years - Total amount borrowed as mortgage

= 333, 000 - 215, 000

= $ 118, 000

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1/5 ( x - 10 ) = 4/5

Answers

The value of x is 14

What are fractions?

Fractions are described as expression that shows the part of a whole number, a whole variable. a whole element.

The different types of fractions are listed as;

Improper fractionsProper fractionsMixed fractionsSimple fractionsComplex fractions

From the information given, we have that;

1/5 ( x - 10 ) = 4/5

This is written as;

(x -10)/5 = 4/5

cross multiply the values, we have;

5(x-10) = 20

expand the bracket

5x - 50 = 20

Collect like terms

5x = 70

Divide the values

x =14

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17. Find m2NSR=
Segment AB is tangent to circle C. Find r.
18. r=
176
40°
35
25
Need help. Please show work and answer 17 and 18

Answers

1. The value of angle NSR is 110°

2. The value of r 12

What is arc angle relationships?

If two secants or chords intersect inside a circle, then the measure of the angle formed is equal to half the sum of the measures of the intercepted arcs.

Therefore;

S = 1/2( 170+40)

S = 1/2 ( 210)

S = 110

Therefore the value of angle NSR is 110°

2. There is a theorem that states that the angle between a radius and tangent is 90°

Using Pythagorean theorem

(25+r)² = r² +35²

= 625 + 50r + r² = r² +35²

625 +50r = r² - r² +35²

50r = 1125-625

50r = 600

r = 600/50

r = 12

therefore the value of r is 12

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100 Points! Geometry question. Photo attached. Determine whether the quadrilateral is a parallelogram. Justify your answer using a theorem. Please show as much work as possible. Thank you!

Answers

The prove of the statement is described below.

First of all ,

Labeling the given figure

And draw  a diagonal,

In the quadrilateral PQRS,

The side PQ is equal to the side RS.

Therefore,

PQ = RS

And also, the side PQ is parallel to the side RS.

Then,

PQ || RS.

Now, draw the diagonal PR.

We know that a parallelogram's diagonal divides the parallelogram into two congruent triangles.

By the rule of  Side-Angle-Side,

we can show that ∆ PQR ≅ ∆ RSP.

Therefore,

The side QR is parallel to PS

Then,

QR || PS.

Hence,

PQRS is a parallelogram.

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Lines y and z are parallel.
Parallel lines are cut by transversals s and t. The angles formed by lines s, t, and y, clockwise from top left, are blank, blank, (10 x + 5) degrees, blank, (4 x minus 7) degrees, blank; formed by s and z are 65 degrees, 1, blank, blank; formed by z and t are 2, blank, blank, blank.
What is the measure of angle 2?
6 degrees
11 degrees
28 degrees
37 degrees

Answers

The measure of Angle 2 is 17 degrees.

The measure of angle 2,  the relationships between the given angles formed by the parallel lines and transversals.

1. The angles formed by lines s, t, and y, clockwise from top left, are:

  - Blank

  - Blank

  - (10x + 5) degrees

  - Blank

  - (4x - 7) degrees

  - Blank

2. The angles formed by s and z are:

  - 65 degrees

  - 1

  - Blank

  - Blank

3. The angles formed by z and t are:

  - 2

  - Blank

  - Blank

  - Blank

From the given information, we can deduce the following:

- Angle 1 is congruent to the angle formed by z and t (corresponding angles).

- Angle (10x + 5) degrees is congruent to angle 65 degrees (alternate interior angles).

- Angle (4x - 7) degrees is congruent to angle 2 (alternate interior angles).

Therefore, we can set up the following equations:

65 = 10x + 5     (Equation 1)

2 = 4x - 7       (Equation 2)

Solving Equation 1:

65 - 5 = 10x

60 = 10x

x = 6

Substituting x = 6 into Equation 2:

2 = 4(6) - 7

2 = 24 - 7

2 = 17

Hence, the measure of angle 2 is 17 degrees.

Therefore, the correct answer is:Angle 2 = 17 degrees.

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What is the quotient of the expression
O7a³ + ab + 3
O7a³ + ab - 3
O7a³ + 4ab+
+8
O7a³+4ab-8
28a b+4a²b²-12ab?
4ab

Answers

The quotient of the expression (7a³ + ab + 3) / (7a³ + ab - 3) divided by 4ab is (7/4a²) + (1/4b) + (3/4ab).

How to find the quotient

By dividing each term of the numerator by 4ab:

(7a³ + ab + 3) / (7a³ + ab - 3) ÷ 4ab

= (7a³ / 4ab) + (ab / 4ab) + (3 / 4ab)

Simplifying each term individually:

= (7/4a²) + (1/4b) + (3/4ab)

Thus, the quotient of the expression (7a³ + ab + 3) / (7a³ + ab - 3) divided by 4ab is (7/4a²) + (1/4b) + (3/4ab).

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Find the area of the parallelogram with given points.
(7,4)
(3,0)
(-4,9)
(13,0)

Answers

The area of the parallelogram with given points is 8√26 or 40.79 square units.

How to calculate the area of this parallelogram?

In Mathematics and Geometry, the area of a parallelogram can be calculated by using the following formula:

Area of a parallelogram, A = b × h

Where:

b represents the base area of a parallelogram.h represents the height of a parallelogram.

Height = √[(x₂ - x₁)² + (y₂ - y₁)²]

Height = √[(3 - 7)² + (0 - 4)²]

Height = √32 units.

Base = √[(13 - 7)² + (0 - 4)²]

Base = √52 units

By substituting the given parameters into the formula for the area of a parallelogram, we have the following;

Area of a parallelogram = √32 × √52

Area of a parallelogram = 8√26 or 40.79 square units.

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50 Points! Multiple choice algebra question. Photo attached. Thank you!

Answers

It would take 21 weeks for the population to surpass 16,000.

The insect population P in a certain area fluctuates with the seasons and is estimated by the function P = 15,000 + 2500 sin(πt/52), where t is given in weeks.

For the population to surpass 16,000, we can set up the following equation:

15,000 + 2500 sin(πt/52) = 16,000

Subtracting 15,000 from both sides, we get:

2500 sin(πt/52) = 1000

Dividing both sides by 2500, we get:

sin(πt/52) = 0.4

We know that sin(πt/52) is positive when t is between 0 and 52 and between 104 and 156 since sine is positive in the first and second quadrants. Therefore, we can write:

πt/52 = sin⁻¹(0.4)

Multiplying both sides by 52/π, we get:

t = (52/π) sin⁻¹(0.4)

Using a calculator, we can evaluate sin⁻¹(0.4) to be approximately 0.4115 radians.

t = (52/π) (0.4115)

t = 21.02

Therefore, it would take 21 weeks for the population to surpass 16,000.

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For the matrix D shown below, determine the value of the element d12. If the element is not defined, click the undefined button. D = [-3 -8 6 -4] Answer:​

Answers

The calculated value of the element d₁₂ is -8

How to determine the value of the element d₁₂

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

The matrix D given as

D = [-3 -8 6 -4]

The element d₁₂ represents the element located at the first row and the second column

In this case, the element located at the first row and the second column is -8

Using the above as a guide, we have the following:

d₁₂ = -8

Hence, the value of the element d₁₂ is -8

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Use the graph to answer the question.

Graph of polygon ABCD with vertices at negative 2 comma negative 1, 0 comma negative 4, 4 comma negative 4, 2 comma negative 1. A second polygon A prime B prime C prime D prime with vertices at 5 comma negative 1, 7 comma negative 4, 11 comma negative 4, 9 comma negative 1.

Determine the translation used to create the image.

7 units to the right
3 units to the right
7 units to the left
3 units to the left

Answers

The translation used to create the image of the second polygon is A, 7 units to the right.

How to determine translation?

To determine the translation used to create the image of the second polygon (A' B' C' D') from the original polygon (ABCD), compare the corresponding vertices.

Original polygon (ABCD):

A (-2, -1)

B (0, -4)

C (4, -4)

D (2, -1)

Image polygon (A' B' C' D'):

A' (5, -1)

B' (7, -4)

C' (11, -4)

D' (9, -1)

To find the translation, calculate the horizontal and vertical differences between the corresponding vertices.

Horizontal difference:

For point A: A'x - Ax = 5 - (-2) = 7

For point B: B'x - Bx = 7 - 0 = 7

For point C: C'x - Cx = 11 - 4 = 7

For point D: D'x - Dx = 9 - 2 = 7

Vertical difference:

For point A: A'y - Ay = -1 - (-1) = 0

For point B: B'y - By = -4 - (-4) = 0

For point C: C'y - Cy = -4 - (-4) = 0

For point D: D'y - Dy = -1 - (-1) = 0

From the calculations, see that the horizontal difference is 7 units for all the corresponding vertices, while the vertical difference is 0 units for all the corresponding vertices.

Therefore, the translation used to create the image of the second polygon is 7 units to the right.

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Mathematical form of the question:

Use the graph to answer the question.

Graph of polygon ABCD with vertices at A (-2, -1), B (0, -4), C (4, -4), D (2, -1). A second polygon A' (5, -1), B' (7, -4), C' (11, -4), D' (9, -1).

Determine the translation used to create the image.

7 units to the right

3 units to the right

7 units to the left

3 units to the left

Why can you not have 1 imaginary solution?

Answers

You cannot have 1 imaginary solution because the quadratic equation must have either two real solutions or two complex solutions

What is an imaginary solution?

In mathematics, the discriminant (D = b2 - 4ac) aids in identifying the kind of solutions to quadratic equations of the form ax2 + bx + c = 0.

There are two unique real solutions if the discriminant is positive. There is only one viable option if the discriminant is zero. There are no practical solutions, however, if the discriminant is negative.

The quadratic equation in this instance has two complex solutions that are conjugates of one another. Because the quadratic equation must have either two real solutions or two complex solutions, there can never be just one hypothetical solution.

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Expand & simplify.

23p - 3( 2k + 14p ) + 5( 6k - p )

Answers

Answer:

23p -6k - 42p + 30k - 5p

23p - 42p - 5p + 30k - 6k

23p - 47p + 24k

-24p + 24k

24(- p + k)

24( k - p)

Answer:

The answer is

60p + 24k

Step-by-step explanation:

1: Expand

=23p - 6k + 42p + 30k - 5p

step2: collect like terms

=42p + 23p - 5p - 6k + 30k

step 3: add/subtract them to get your answer

=60p + 24k

your answer☝

Halle planted mint and basil seeds in her herb garden. She measured the height of each herb plant at the end of each week for six weeks. The results are shown in the line graph below.


What is the difference to the nearest tenth in the mean growth per week for both herbs during the six weeks shown in the graph?
A. 0.7cm/week
B. 0.6cm/week
C. 3.7cm/week

Answers

The difference in mean growth per week is 3.7cm/week

From the graph given :

Growth per week for Basil = 2, 6, 9, 10, 14, 16

Growth per week for Mint = 1, 2, 4, 7, 9, 12

Mean growth per week = (2+6+9+10+14+16) / 6 = 9.5 cm/week

Mean growth per week (Mint) = (1+2+4+7+9+12)/6 = 5.83 cm/week

The difference cannbe obtained by subtracting the mean Values thus ;

Difference in average growth = 9.5 - 5.83 = 3.67 cm/week

Therefore, the difference in mean growth per week is 3.7cm/week

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Question 5 Joy is a 52-year-old nurse who earns a salary of R286 500 per annum. She contributes 7% of her annua salary to a pension fund. She only has her 2 daughters listed as a dependents on her medical aid. Sh is concerned that the R4000 monthly income tax deduction is too much.​

Answers

Determine Joy's annual income tax liability. If the amount is significantly different from the R4000 monthly deduction, she may need to consult a tax advisor to ensure accurate tax planning.

To assess whether the monthly income tax deduction of R4000 is too much for Joy, we need to calculate her annual income tax liability and compare it to the deduction.

First, let's calculate the amount Joy contributes to her pension fund annually:

Pension fund contribution = 7% of annual salary

Pension fund contribution = 7/100 * R286,500

Pension fund contribution = R20,055

Next, we need to determine Joy's taxable income by subtracting her pension fund contribution from her annual salary:

Taxable income = Annual salary - Pension fund contribution

Taxable income = R286,500 - R20,055

Taxable income = R266,445

Now, we can calculate the income tax liability based on the South African income tax brackets for the 2023 tax year. Please note that tax brackets are subject to change, so it's essential to verify with the latest tax regulations.

According to the current tax brackets, the tax rates for the 2023 tax year are as follows:

18% on the first R216,200 of taxable income

26% on the portion of taxable income between R216,201 and R337,800

31% on the portion of taxable income between R337,801 and R467,500

36% on the portion of taxable income between R467,501 and R613,600

39% on the portion of taxable income above R613,601

Using these tax rates, we can calculate the income tax liability:

Tax liability = (18% * amount within first bracket) + (26% * amount within second bracket) + (31% * amount within third bracket) + (36% * amount within fourth bracket) + (39% * amount within fifth bracket)

First, let's calculate the amounts within each tax bracket:

Amount within first bracket = min(Taxable income, R216,200)

Amount within second bracket = min(max(Taxable income - R216,200, 0), R337,800 - R216,201)

Amount within third bracket = min(max(Taxable income - R337,800, 0), R467,500 - R337,801)

Amount within fourth bracket = min(max(Taxable income - R467,500, 0), R613,600 - R467,501)

Amount within fifth bracket = max(Taxable income - R613,600, 0)

Now, let's substitute the values and calculate the income tax liability:

Tax liability = (18% * min(Taxable income, R216,200)) + (26% * min(max(Taxable income - R216,200, 0), R337,800 - R216,201)) + (31% * min(max(Taxable income - R337,800, 0), R467,500 - R337,801)) + (36% * min(max(Taxable income - R467,500, 0), R613,600 - R467,501)) + (39% * max(Taxable income - R613,600, 0))

By calculating this equation, you can determine Joy's annual income tax liability. If the amount is significantly different from the R4000 monthly deduction, she may need to consult a tax advisor to ensure accurate tax planning.

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Ms. Edwards is redecorating her office. She has a choice of 8 colors of paint, 5 kinds of curtains, and 6 colors of carpet. How many different ways are there to redecorate?

240 ways
297 ways
357 ways
19 ways

Answers

Answer:

To determine the total number of different ways Ms. Edwards can redecorate her office, we need to multiply the number of choices for each item:

Number of paint color choices = 8

Number of curtain choices = 5

Number of carpet color choices = 6

To calculate the total number of ways, we multiply these choices together:

Total number of ways = Number of paint color choices × Number of curtain choices × Number of carpet color choices

= 8 × 5 × 6

= 240

Therefore, there are 240 different ways for Ms. Edwards to redecorate her office. So, the answer is 240 ways.

Billy, Kip, and Patrick earned a combined 14 points during their team's game. Billy earned 5 points and Kip earned 6 points. Which of the following equations can be used to determine how many points Patrick earned?

5 + 6 = 14 + y
6y + 5 = 14
5y + 6 = 14
5 + 6 + y = 14

Answers

The equation can be used to determine how many points Patrick earned is ;5 + 6 + y = 14.

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

A mathematical equation is a statement with two equal sides and an equal sign in between.  4 + 6 and 10 can be seen on the left and right sides of the equal sign, respectively.

Given that Billy, Kip, and Patrick earned a combined 14 points during their team's game. Billy earned 5 points and Kip earned 6 points.

We can determine the direct answer by taking Billy and Kip's points and subtracting it from the total combined points.

That will give us 11, which means Patrick earned 3 points.

The equation we can use to represent this is ;5 + 6 + y = 14.

Katrina wants to make a cover for her laptop to fit into her bag in order to protect it. She measured the top of her laptop and found it was 57,000 mm2. “No one sells covers using square millimeters,” her friend noted. Describe the area of the top of Katrina’s laptop using square centimeters.​

Answers

Answer:

To convert square millimeters to square centimeters, we need to divide the area in square millimeters by 100 (since there are 100 square millimeters in a square centimeter).

So, the area of the top of Katrina's laptop in square centimeters would be:

57,000 mm² ÷ 100 = 570 cm²

Therefore, the area of the top of Katrina's laptop in square centimeters is 570 cm².

How can graph coloring be applied in real-world situations, and what are the challenges and limitations associated with using graph coloring algorithms? Provide specific examples to support your answer.

Answers

Answer:

Graph coloring is a widely used concept in real-world situations, particularly in computer science and engineering. It involves assigning colors to the vertices of a graph, with no adjacent vertices having the same color. One real-world application of graph coloring is in scheduling problems, where tasks must be assigned to resources such as workers or machines, with the constraint that no two tasks requiring the same resource can be scheduled at the same time. Another application is in map coloring, where regions on a map are assigned colors in such a way that no two adjacent regions have the same color.

Challenges and limitations associated with using graph coloring algorithms include the exponential increase in computation time as the size of the graph increases, making it difficult to apply the algorithm to very large graphs. Additionally, some graph coloring problems may be NP-hard, meaning that no polynomial-time algorithm is known that can solve them for all possible inputs. This can make it challenging to find an optimal solution, and instead approximate solutions may need to be used.

For example, in telecommunication networks, channel assignment is a common problem of graph coloring. In mobile networks, different channels must be assigned to different cells to avoid interference and ensure efficient use of resources. The channel assignment problem can be formulated as a graph coloring problem, where the vertices represent cells and the edges represent interference.

Another example is in scheduling of sports leagues. In this case, teams are assigned to play on different days and times in such a way that no two teams play against each other more than once and no team plays two games on the same day. This can be formulated as a graph coloring problem, with vertices representing teams and edges representing games between teams.

In conclusion, graph coloring algorithms have numerous real-world applications. While there are challenges and limitations associated with these algorithms, they continue to be an important tool for solving optimization problems in a wide range of fields.

Step-by-step explanation:

least common denominator of -3/a and 1/4a^2

Answers

Answer:

-12a-1/4a2

Step-by-step explanation:

Calculate the unknown length, x, in the shape below.
If your answer is a decimal, give it to 1 d.p.
8
8 cm
area = 55 cm²
area=178.2 cm²
15 cm

Answers

The triangles are similar triangles. Then the value of 'x' will be 27 cm.

The polygonal shape of a triangle has a number of sides and three independent variables. Angles in the triangle add up to 180°.

The ratio of the matching sides will remain constant if two triangles are comparable to one another.

From the above theorem, the equation is given as,

(x/15)² = 178.2 / 55

Simplify the equation, then we have

(x/15)² = 3.24

x/15 = 1.8

x = 27 cm

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Currently it is estimated that 3 out of every 1000 Californians are infected with
coronavirus. The so-called rapid "antigen" test for coronavirus has a very low false
positive rate of just 0.05, but has a high false negative rate of 0.2. The so-called
PCR test is more reliable: it has an even lower false positive rate than the antigen
test, namely only 0.001, but even more importantly its false negative rate is much
lower at 0.01.
What is the probability that you have a coronavirus infection conditional on your
PCR test has coming back positive?

Answers

The probability that an antigen test comes back positive is approximately 0.05225, or about 5.225%.

We have,

To find the probability that an antigen test comes back positive, we need to consider both the true positive rate (probability of a positive test given that the person is infected) and the false positive rate.

Now,

Prevalence of coronavirus in California: 3 out of 1000

False positive rate of the antigen test: 0.05 (5 out of 100)

Let's calculate the probability of a positive test result.

The true positive rate can be calculated as 1 minus the false negative rate (probability of a negative test given that the person is infected):

True positive rate = 1 - 0.2 = 0.8 (or 80 out of 100)

The probability of a positive test result can be calculated using Bayes' theorem:

P(Positive test) = P(Positive test | Infected) x P(Infected) + P(Positive test | Not Infected) x P(Not Infected)

P(Positive test) = (0.8 x 3/1000) + (0.05 x 997/1000)

P(Positive test) = 0.0024 + 0.04985

P(Positive test) = 0.05225

Therefore,

The probability that an antigen test comes back positive is approximately 0.05225, or about 5.225%.

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PLS HELP MARKING AS BRAINLIST

Answers

Answer:

108 sq ft

Step-by-step explanation:

The formulas are given in the bottom right.

For the triangles*, the base = 8 ft. The height = 6 feet.

Area = (bh)/2.

Area = (8*6)/2 = (48)/2 = 24 sq ft.

There are two of those identical triangles. 24+24 = 48.

(*Another way to look at this is to say that the base = 8+8 = 16. Area = (bh)/2 = (16*6)/2 = 96/2 = 48. It doesn't matter, mathematically. I can't tell if they have tried to show this as 2 triangles or one.)

For the bottom rectangle, area = length x width = 6*10 = 60 sq ft.


Add them up! 24 + 24 + 60 = 108 sq ft.

Write and solve an equation to find the value of x.

Answers

The value of x for each item is given as follows:

28. x = 5.

29. x = 3.44.

How to obtain the value of x in each item?

For item 28, we apply the crossing chord theorem, which states that the products of the parts of the chords are equal, hence the value of x is obtained as follows:

16x = 10 x 8

16x = 80

x = 5.

For item 29, we apply the two secant theorem, hence the value of x is obtained as follows:

10(x + 10) = 12(12 + 25)

10x + 100 = 444

10x = 344

x = 3.44.

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