The 4 properties of solutions are:
1) Consistency
2) Validity
3) Feasibility
4) Stability
PROPERTIES OF SOLUTIONSIn mathematics, a solution to an equation or system of equations is a set of values that can be substituted into the equation(s) to make the statement(s) true. The four properties of a solution are:
1) Consistency: A solution exists and is unique, or multiple solutions exist.
2) Validity: The solution(s) must satisfy the equation(s) and any constraints or boundary conditions.
3) Feasibility: The solution(s) must be within the domain of the equation(s) and any constraints or boundary conditions.
4) Stability: The solution(s) should be insensitive to small changes in the equation(s) or initial conditions.
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A rectangle has a length of 5x+2 and a width of 3x - 1. If x=10, what is the perimeter and area?
Answer:
Perimeter = 162 units
Area = 1508 square units
Step-by-step explanation:
Given expressions:
Length = 5x + 2Width = 3x - 1If x = 10, then:
Length = 5(10) + 2 = 52Width = 3(10) - 1 = 29The formula for the perimeter of a rectangle is:
P = 2(w + l)where w is the width and l is the length.
Therefore, the perimeter of the rectangle is:
[tex]\implies \sf P = 2(29 + 52)[/tex]
[tex]\implies \sf P = 2(81)[/tex]
[tex]\implies \sf P = 162\;units[/tex]
The formula for the area of a rectangle is:
A = w · lwhere w is the width and l is the length.
Therefore, the area of the rectangle is:
[tex]\implies \sf A=29 \cdot 52[/tex]
[tex]\implies \sf A=1508\;square\;units[/tex]
Answer:
Area of rectangle = 1508
Perimeter of rectangle = 162
Step-by-step explanation:
Now we have to,
→ find the perimeter and area.
→ where x = 10.
Perimeter of rectangle is,
→ P = 2 × (L + W)
→ P = 2 × (5(10) + 2 + 3(10) - 1)
→ P = 2 × (50 + 2 + 30 - 1)
→ P = 2 × 81
→ [ P = 162 ]
Area of rectangle will be,
→ A = L × W
→ A = (5(10) + 2) × (3(10) - 1)
→ A = (50 + 2) × (30 - 1)
→ A = 52 × 29
→ [ A = 1508 ]
Hence, these are the values.
Element X decays radioactively with a half life of 6 minutes. If there are 220 grams of
Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 26 grams?
What is the formula in finding the distance between a point and a line?
To find the equation of the line, we can use the two points on the line.
What is equation?An equation is a mathematical statement that expresses the relationship between two or more variables, or a condition that two or more expressions must satisfy. An equation typically involves an equal sign, with an expression on either side of the sign. The expressions on each side of the equation can contain constants, variables, functions, operations, and other mathematical symbols. Equations are used to solve problems in mathematics, physics, engineering, chemistry, economics, and other scientific and practical fields.
The distance between a point (P) and a line (L) can be found using the following formula:
d = |(ax + by + c)|/√(a^2 + b^2)
where (a, b, c) are the coefficients of the line equation, and (x, y) are the coordinates of the point.
To find the equation of the line, we can use the two points on the line. Let's say these two points are (x1, y1) and (x2, y2). We can calculate the equation of the line using the following formula:
a = (y2 - y1)/(x2 - x1)
b = -1
c = y1 - ax1
Using these equations, we can easily calculate the distance between the point and the line.
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A curve has the equation, [tex]y=2ln(k-3x)+x^2-3x[/tex] where [tex]k[/tex] is a positive constant. It is also given that the curve crosses the x-axis at exactly one point. Find the value of [tex]k[/tex].
The value of k in the equation is 3x + e^(x^2-3x/2)
How to determine the value of kFrom the question, we have the following parameters that can be used in our computation:
y = 2ln(k - 3x) + x^2 - 3x
The x-axis is the set of points where y = 0. To find where the curve crosses the x-axis, we need to solve the equation y = 0 for x.
y = 2ln(k - 3x) + x^2 - 3x
so
0 = 2ln(k - 3x) + x^2 - 3x
We can re-arrange this equation to solve for x:
x^2 - 3x + 2ln(k - 3x) = 0
Now we can use the quadratic formula to find x.
x = (3 +/- sqrt(3^2 - 4(2ln(k - 3x))))/2
Now we know that there is only one root, we can pick the positive value and solve for k using k-3x = e^(x^2-3x/2)
k = 3x + e^(x^2-3x/2)
This is the final solution for k.
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Announcements for 84 upcoming engineering conferences were randomly picked from a stack of IEEE Spectrum magazines. The mean length of the conferences was 3.94 days, with a standard deviation of 1.28 days. Assume the underlying population is normal.
a. In words, define the random variables X and .
b. Which distribution should you use for this problem? Explain your choice.
c. Construct a 95% confidence interval for the population mean length of engineering conferences.
i. State the confidence interval.
ii. Sketch the graph.
iii. Calculate the error bound.
The random variable X represents the length of each engineering conference, and is measured in days.
The normal distribution should be used for this problem, as the underlying population is normal. The normal distribution is a continuous probability distribution that is characterized by a symmetric bell-shaped curve. It is a useful model for events that follow a normal or Gaussian pattern, such as the lengths of engineering conferences.
c. i. The 95% confidence interval for the population mean length of engineering conferences is (3.38, 4.50) days.
ii. The graph of the 95% confidence interval for the population mean length of engineering conferences is shown below.
iii. The error bound for the 95% confidence interval is 0.77 days. This can be calculated using the formula: Error Bound = 1.96*(standard deviation/√sample size). In this case, the error bound is calculated as: 1.96 * (1.28/√84) = 0.77.
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Please answer
really urgent
Answer:
128 дней (days)
Step-by-step explanation:
5375/42 = 128 (округляем)
Answer:
128 days
Step-by-step explanation:
To solve this problem, we simply have to divide the total amount of oil in the tank by the amount of oil used each day.
[tex]5375 \textrm{ liters} \times \dfrac{1 \textrm{ day}}{42 \textrm{ liters}} = \dfrac{5375}{42} \textrm{ days} \approx 128 \textrm{ days}[/tex]
So, the tank will be empty after 128 days.
Note that the number of days is approximate; normally when measuring in the real world, whole numbers are used, as decimals in certain contexts (like in this situation) are confusing. So to simplify our answer, we can simply round up to 128 because by the end of the 128th day, the tank will be empty.
Whiskers the cat weighs kg. Piglio weighs 4 kg. Write a multiplication equation and a division equation for the question.
How many times as heavy as Piglio is Whiskers?
The ratio between the weights, giving how much Piglio is heavier than Whiskers, is given as follows:
1.5.
How to obtain the ratio between two amounts?The ratio between two amounts a and b is obtained applying the proportion between these two amounts, that is, dividing a by b, as follows:
Ratio = a/b.
Which gives how many times greater the measure a is than the measure b, if the ratio is greater than 1.
The weight for each cat in this problem is given as follows:
Whiskers: 2 and 2/3 kg -> as a decimal 2 + 2/3 = 2 + 0.67 = 2.67 kg.Piglio: 4kg.The ratio between the weights of Piglio and Whiskers is given as follows:
Ratio = 4/2.67
Ratio = 1.5.
Meaning that Piglio is 1.5 times heavier than Whiskers.
Missing Information:Whisker's weight is given as follows: 2 and 2/3 kg.
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Jaycee created a figure by drawing a right
triangle next to a rectangle.
10 cm
-20 cm-
-15 cm-
What is the area of the figure in square
centimeters?
The area of the figure, which has a triangle and a rectangle with the same height, is 275 cm2.
what is rectangle ?You may also refer to it as a quadrilateral that is equiangular, meaning that all of its angles are equal. The parallelogram could alternatively have a straight angle. Rectangles with four sides that are all the same size are called squares. Four 90-degree vertices and equal parallel sides make up a quadrilateral with the rectangular shape. A rectangle is also referred to as a parallelogram since its opposing sides are parallel and equal.
given
Area of Figure = Area of Rectangle + Area of Triangle
= l*b+ 1/2*b*h
= 10 * 20 * 1/2 * 15 * 10
= 275cm2
The area of the figure, which has a triangle and a rectangle with the same height, is 275 cm2.
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Manuel and Ruben both have bank accounts. The table represents the balance, y, for each account after x weeks. Which system of equations represents the table?
y = 11.5x and y = –13x
y = 11.5x + 218 and y = –13x + 22
y = 11.5x + 22 and y = –13x + 218
y = 22x + 11.5 and y = 218x – 13
The system of Equation the tables represent are:
y = 11.5x + 22 and y = –13x + 218
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
Manuel:
slope = (33.50- 22)/ (1-0)
slope = 11.5
So, the Equation for Manuel
y- 22= 11.5 (x- 0)
y- 22 = 11.5x
y= 11.5x + 22
Ruben:
slope = (205- 218)/ (1-0)
slope = - 13
So, the Equation for Ruben
y- 218= -13 (x- 0)
y- 218 = -13x
y= -13x + 218
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75% of the ticket old at an amuement park were dicount ticket. If the park old 68 ticket in all, how many dicount ticket did it ell?
Total discount ticket at the amusement park were 51. If 75% of the sold ticket were discounted tickets and if the amusement park sold 68 tickets in all.
Total number of ticket sold = 68
75% of them were discount tickets, = 75 × 68/100
= 51 tickets
So 51 tickets were discount tickets and (68-51) = 17 tickets were without discount tickets. We can also calculate the without discount ticket by a different method. Remaining 25% tickets were the without discount tickets. So,
= 25 × 68/100
= 17 Tickets
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The functions approximate the velocities (in meters per second) of an object
dropped from a height of x feet right before it hits the ground on Earth and Venus.
What is the velocity of an object dropped from a height of 100 feet right before it
hits the ground on Venus?
Earth: E(x) = 4.4√x
Venus: V(x) = 0.9 x E(x)
The velocity of the object dropped from a height of 100 feet is equal to 21.86 m/sec
What is the speed of an object?Speed is the rate at which an object's position changes, measured in meters per second. For example, if an object starts at the origin, and then moves three meters in three seconds, its speed is one meter per second. The equation for speed is simple: distance divided by time
Given here: V(x)=0.9×4.4√x
Thus if x=100feet or 30.47 m putting this value in the equation we get
V(30.47)=0.9×4.4√30.47
= 21.86 m/sec
Hence, the velocity of the object dropped from a height of 100 feet is equal to 21.86 m/sec
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Higher Order Thinking Hugo needs a total
of 22.23 square feet of terry cloth to make a
beach towel and a beach bag. The beach bag
requires 5.13 square feet of cloth. What is the
length of the beach towel? Explain.
The length of the beach towel is 4.135 feet.
What is Area?Area of a two dimensional shape is the total region which is bounded by the object's shape
Given that
Hugo needs a total of 22.23 square feet of terry cloth to make a beach towel and a beach bag.
Total area of the terry cloth = 22.23 square feet
The beach bag requires 5.13 square feet of cloth.
Area of cloth for beach bag = 5.13 square feet
Area of the cloth for beach towel = 22.23 - 5.13 = 17.1
Area of the beach towel is 17.1 square feet.
Assuming the towel is square shape,
(Length of the towel)² = 17.1
Length of the towel = √(17.1) = 4.135
Hence the length of the beach towel is 4.135 feet.
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2 large solar panels can charge an electric car
in the same time as 6 small solar panels.
If 2 large solar panels can charge a car in
240 minutes, how many minutes would it take
for 5 large solar panels and 3 small solar
panels to charge the car?
The time taken by 5 large solar panels and 3 small solar panels to charge a car, found using the unitary method, is 576 minutes.
What is unitary method?The unitary approach is a method for problem-solving that involves first determining the value of a single unit, and then determining the necessary value by multiplying the single unit value.
Given
Time taken by 2 large solar panels to charge a car = 240 minutes
Time taken by 2 large solar panels to charge a car
= Time taken by 6 small solar panels to charge a car = 240 minutes
The unitary method can be used to find the charging times of 1 large and 1 small solar panel.
The time taken by 1 solar panel is greater than time taken by 2 large and 6 small solar panels.
Time taken by 1 small solar panel = 240 * 6 = 1440 minutes
Time taken by 1 large solar panel = 240 * 2 = 480 minutes
Therefore the time taken by 5 large solar panels and 3 small solar panels to charge a car = (480/5)+ (1440/3) =96 + 480= 576 minutes.
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Is root 1 and 1 are equal?
No, the square root of 1 is 1, but 1 is not equal to the square root of 1. The square root of a number, represented by the symbol √, is a value that, when multiplied by itself, gives the original number.
For example, the square root of 4 is 2, because 2 x 2 = 4. In the case of 1, the square root is also 1, because 1 x 1 = 1.
In mathematics, the square root of a number is always non-negative, real number. It is positive for positive numbers and zero for zero. So, in short, the square root of 1 is 1, but 1 is not equal to the square root of 1. It is just a value that gives 1 when multiplied with itself.
It's important to note that the square root is not a number but an operator, an action which you perform on a number. The square root of a number is a value that, when multiplied by itself, gives the original number.
In this case, the square root of 1 is 1, which means that 1 multiplied by 1 is 1.
Also, it's worth mentioning that there are two types of square roots: principal square root and non-principal square roots. Principal square root is the positive value of the square root and non-principal square roots are the negative value of the square root.
In this case, the square root of 1 is 1, which is the positive value of the square root.
In conclusion, the square root of 1 is 1, and it is the positive value of the square root, but 1 is not equal to the square root of 1, as the square root is a value that gives the original number when multiplied by itself.
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Why does the acute angles in a right triangle determine the ratio of the side lengths?
Answer:
Step-by-step explanation:
If two right triangles share an acute angle measure, they are similar by angle-to-angle similarity. Corresponding side length ratios in the triangle are the same. The ratio of the side lengths of a right triangle depends only on the acute angle.
The lines graphed below are parallel. The slope of the red line is - What is
3
the slope of the green line?
m=
O A. - 13/3
B. 3/1
OB.
O
c. - 3/1
D. 437
5
The slope of the green line is -4/3.
The correct option is C.
What is the slope of the line?
The slope of a line is a measure of how steep the line is and the direction it is going. It is defined as the ratio of the "rise" (the change in the y-coordinate) to the "run" (the change in the x-coordinate) between two points on the line.
The slope of a line is often represented by the letter "m" and can be calculated using the following formula:
m = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are two points on the line.
It is given that the lines graphed below are parallel.
We know that if two line having slopes m₁ and m₂ are parallel, then
m1 = m2
In other words, the slopes of two parallel lines are the same.
The slope of the red line is -4/3 and it is parallel to the green line. It means the slope of red and green line are the same.
The slope of green line = Slope of the red line
The slope of the green line = -4/3
Hence, The slope of the green line is -4/3.
The correct option is C.
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The slope of the green line is -4/3. The correct option is C.
What is the slope of the line?
The slope of a line is a measure of how steep the line is and the direction it is going. It is defined as the ratio of the "rise" (the change in the y-coordinate) to the "run" (the change in the x-coordinate) between two points on the line.
The slope of a line is often represented by the letter "m" and can be calculated using the following formula:
m = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are two points on the line.
It is given that the lines graphed below are parallel.
We know that if two line having slopes m₁ and m₂ are parallel, then
m1 = m2
In other words, the slopes of two parallel lines are the same.
The slope of the red line is -4/3 and it is parallel to the green line. It means the slope of red and green line are the same.
The slope of green line = Slope of the red line
The slope of the green line = -4/3
Hence, The slope of the green line is -4/3.
The correct option is C.
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which is an appropriate estimate for the following 3,844 divide by 75
What are the 5 properties of inequality?
The set of properties for inequalities is as follows:
1. Additive characteristics of inequality
2. Inequality's subtraction property
3. The inequality's multiplication property
4. The unequal division property
5. Converse Property
An inequality is a relationship between two expressions that can be described mathematically and can be represented by any of the following symbols: >, <, ≤, ≥, =, and ≠.
The set of properties for inequalities is as follows:
1. Additive characteristics of inequality: The inequality remains the same even if both sides are given the same value.
2. Inequality's subtraction property: The inequality remains the same even after deducting the same amount from each side of it.
3. The inequality's multiplication property: Take p and q, two positive numbers. When p and q are both multiplied by the same positive value, the inequality stays the same. However, the inequality changes when p and q are both multiplied by the same negative value.
4. The unequal division property: Take p and q, two positive numbers. When p and q are both divided by the same positive number, the inequality is unaffected. However, the inequality is reversed when p and q are split by the same negative value.
5. Converse Property: According to the converse property, all we need to do to reverse the inequality symbol is flip the number.
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What are the 5 common geometric shapes?
Circle, triangle, rectangle, rhombus, square, and trapezoid are the 5 common geometric shapes.
Who named geometry?The father of geometry, Euclid was a brilliant mathematician. Learn more about Euclid and the history of some of the math ideas we use today to see how important they have become.
The terms "ge" and "metria," which both imply "measuring," are the origins of geometry. For more than 2000 years, the Greeks' method of approaching geometry has served as the foundation for geometry.
The study of various mathematical or actual-world forms, figures, and sizes is known as Geometry. We learn about various angles, transformations, and similarities between the forms in geometry. The point, line, and plane are the main building blocks of geometry.
Thus, circle, triangle, rectangle, rhombus, square, and trapezoid are the 5 common geometric shapes.
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Circle, triangle, rectangle, rhombus, square, and trapezoid are the 5 common geometric shapes.
Define geometric shapes.Any building, whether open or closed, with a specific shape and characteristics composed of lines, curves, and points is referred to as a geometric shape. Squares, rectangles, circles, cones, cylinders, spheres, and so on are a few examples of well-known geometric forms. Each of these forms has specific characteristics that set them apart from other shapes.
Figures enclosed by a boundary created by combining a specific number of curves, points, and line segments are referred to as geometric forms. Every shape has a distinctive name like a circle, square, triangle, or rectangle, for example. In everyday life, we are surrounded by a variety of fundamental geometric forms, such as the triangle-shaped pizza slice, rectangle-shaped doors and windows, and many more.
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The circumference of the circle is 38 inches.
a) Find the radius of the circle
b) Find the area of the circle
Roni and Allie are mowing the grass at the soccer field. Roni has a riding lawn mower and can mow the field in 30 minutes. Allie is pushing a lawn mover and can mow the field in 75 minutes. If Roni and Allie work together to mow the field, what part of the field would Roni mow?
The part of the field would Roni mow will be 4 3/7 of the field.
How to calculate the fraction?To find out what part of the field Roni would mow if he and Allie worked together to mow the field, you would need to calculate their combined rate of mowing.
You can find the combined rate by adding the rates of each person working alone:
Combined rate = (Roni's rate) + (Allie's rate)
Combined rate = (1/30 hour) + (1/75 hour) = (5/150) + (2/150) = (7/150) hour
Then divide the rate of Roni by the combined rate to find the proportion of the field that Roni would mow:
(Roni's rate) / (Combined rate) = (1/30 hour) / (7/150 hour) = (30/7) / 1 = 4.2857142857142856
So Roni would mow about 4.29 or roughly 4.3/7 of the field if he and Allie worked together.
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Simplify:
[tex]\frac{a^3-2a^2-15a}{a^3+a^2-30a}[/tex]
Answer:
Step-by-step explanation:
[tex]\frac{a^{3}-2a^{2}-15a }{a^{3}+a^{2}-30a} =\frac{a^{2}-2a-15}{a^{2}+a-30}[/tex]
[tex]\frac{a^{2}-2a-15}{a^{2}+a-30}=\frac{(a-5)(a+3)}{(a-5)(a+6)}= \frac{(a+3)}{(a+6)}[/tex]
Adalyn is stocking up on cans of soup for the winter. They are on sale for $2.25 each and she has a $3 coupon. If she can spend no more than $30 on soup, how many cans can she buy?
Using simple mathematical operations, we know that Adalyn can purchase 14 cans if she spends no more than $30.
What are mathematical operations?An operation is a function in mathematics that transforms zero or even more input values into a clearly defined output value.
The firm's arity is influenced by the number of operands.
Most people believe that addition, subtraction, multiplication, and division are the four basic operations in mathematics.
So, we know that:
Money =30 + 3 = 33
Price per can 2.25.
Then, she can buy:
33/2.25 = 14.67
Round off to 14 cans.
Therefore, using simple mathematical operations, we know that Adalyn can purchase 14 cans if she spends no more than $30.
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Kara is building a sandbox shaped like a kite for her nephew. The top two sides of the sandbox are 29 inches long. The bottom two sides are 25 inches long. The diagonal DB has a length of 49 inches. What is the length of the diagonal AC
The length of diagonal AC is 54.8 inches when two sides are 29inches and 25 inches long.
How is this determined?To find the length of diagonal AC in the kite-shaped sandbox, we can use the Pythagorean Theorem. The Pythagorean Theorem states that in a right triangle, the length of the hypotenuse (the longest side) is equal to the square root of the sum of the squares of the other two sides.
How to use the Pythagorean Theorem?Identify the right triangle. In this case, we can see that the right triangle is formed by diagonal DB and the two sides of length 25 inches, which we'll call side a.
Substitute the known values into the formula, where AC is the hypotenuse and a and DB are the other two sides of the triangle: AC^2 = a^2 + DB^2
Solve for AC by taking the square root of both sides: AC = √(a^2 + DB^2)
Substitute the given values for a and DB: AC = √(25^2 + 49^2) = √(625 + 2401) = √3016 = 54.8
It's important to note that the kite shape can be considered as two congruent right triangles. The sides 25 and 29 are the legs, and the diagonal DB (49 inches) is the hypotenuse of one of the triangles. Since the triangles are congruent, their hypotenuse will have the same length. Therefore, the diagonal AC, which is the hypotenuse of the other triangle, also has a length of 49 inches.
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What is the area of the triangle GHJ?
The area of the triangle GHJ is 48 square units.
The area of a triangle can be found using the formula:
Area = (1/2) * base * height.
In this question, we are given that triangle GHJ has a base of 12 units and a height of 8 units. To find the area of the triangle, we simply substitute these values into the formula and solve.
Area = (1/2) * 12 * 8 = 48 square units
To be more specific, first, we multiply the base and height together to get 12*8 = 96. Then we divide 96 by 2 to get 48. Therefore, the area of triangle GHJ is 48 square units.
It's important to note that the base and height of a triangle must be perpendicular to each other in order for the formula to be accurate. Also, the unit of measurement used for the base and height must be consistent, otherwise, the area calculated will not be correct.
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The complete question is:
A triangle GHJ has a base of 12 units and a height of 8 units. What is the area of the triangle GHJ?
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A cube has a surface area of 181. 5 sq. In. What is the length of its sides? 5. 5 inches 45. 375 inches 30. 25 inches.
The length of side of the cube with 181 square inches surface area is 5.5 inches
The information that was provided indicates that the surface area of the cube is 181.5 square inches. A cube's surface area is calculated as the square of the length of each side multiplied by 6. The formula to use in order to get the total surface area of a cube is = 6a²
Where "a" represents the side of the cube.
As a result, 6a² = 181.5 square inches
a² = 181.5/6
a² = 30.25
a² = √30.25
a = 5.5 inches
Therefore, each face of the cube is 5.5 inches on a side.
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20 points, please help.
Answer:
Drew is incorrect
Step-by-step explanation:
Let the number be x such that if the product of the number and 4 is 1.08 then
x * 4 = 1.08
Divide both sides by 4
x = 1.08/4
= 0.27
Drew is incorrect because the result (1.08) has 2 decimal places and not one like he concluded. The number of digits before the decimal point for the numbers being multiplied must be 2.
Explaining How to Write a Quad
Explain how you could write a quadratic function in
factored form that would have a vertex with an x-
coordinate of 3 and two distinct roots.
y = (x - 4) (x - 4) The factored quadratic function (x - 2) has a vertex with an x-coordinate of 3, and two unique roots.
what is function ?The study of mathematics covers numbers and their variations, equations and related structures, shapes and their locations, and locations where they can be found. The relationship between a group of inputs, each of which has a corresponding output, is referred to as a "function." A function is a relationship between inputs and outputs where each input produces a single, unique result. Each function is assigned a domain and a codomain, or scope. Typically, the symbol f is used to represent functions (x). input consists of an x. Based on the following criteria, there are four primary categories of functions that are available: on functions, one-to-one functions, many-to-one functions, within functions, and on functions.
given
Two distinct roots means two real solutions for x (the parabola needs to cross the x-axis twice)
Vertex form of a quadratic equation: (h,k) is vertex
y = a(x-h)^2 + k
The x of the vertex needs to equal 3
y = a(x-3)^2 + k
y = (x-3)^2 - 1
y = x^2 -6x + 8
y = (x - 4) (x - 4) The factored quadratic function (x - 2) has a vertex with an x-coordinate of 3, and two unique roots.
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The Ratio Of A Screen's Width to it's height is 4:3.
The height of the screen is 24 cm.
What is it's width in centimetres (cm)?
Answer:
The height is 32
Step-by-step explanation:
The ratio of width to height is
4:3
We know the height is 24 so to go from 3 to 24 is multiplying by 8.
Multiply all terms by 8
4 * 8 : 3 * 8
32: 24
The ratio of the width to height is
32:24
The height is 32
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Work Shown
width/height = 4/3
w/24 = 4/3
3w = 24*4
3w = 96
w = 96/3
w = 32 cm is the width
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Another approach.
The ratio of width to height is 4:3, meaning a screen that has width 4 cm and height 3 cm is possible. Instead, we want the "height 3 cm" to be "height 24 cm". This is a jump of "times 8".
Multiply both parts of that ratio by 8 to get...
4:3
8*4:8*3
32:24
A screen that is 32 cm wide and 24 cm tall will give us a ratio 4:3 when simplifying fully.
The order of the numbers is important. We have the width listed first simply because it was listed first in the phrasing "ratio of width to height".
please help with this question in the screenshot !!!
The Volume of shape Q is 25,600 cm³.
What is Scale factor?A scale factor is a numerical value that can be used to alter the size of any geometric figure or object in relation to its original size. It is used to find the missing length, area, or volume of an enlarged or reduced figure as well as to draw the enlarged or reduced shape of any given figure. It should be remembered that the scale factor only affects how big a figure is, not how it looks.
Given:
If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared.
Let z be the scale factor
x be the surface area of shape Q
and, y be the surface area of shape P
So, z²=x/y
we have,
x = 2880 cm², y= 720 cm²
z² = 2880/720
z² = 4
z = 2
Now, If two figures are similar, then the ratio of its volumes is equal to the scale factor elevated to the cube
z³ = x/y
We have z= 2 and y = 3200 cm³
So, 2³ = x/3200
x = 8×3200
x = 25,600 cm³
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