Math 8

Which expressions are equivalent to 3^-8/ 3^-4 ? Select all that apply.

3^-4 and 1/3^4

What fraction is equivalent to .4444444? _

4/9

what is the distance from Bumper Cars to the Restroom, if each of the square was 1 kilometer.

9.2 kilometers

Which statements comparing the functions are true? (Choose all that apply) a. The y-intercept of Function W is equal to the y-intercept of Function Z. b. The y-value when x=-4 for Function W is equal to the y-value when x=-4 for Function Z. Selected: c. The slope of Function W is less than the slope of Function Z.This answer is correct. Selected: d. The y-value when x=-4 for Function W is greater than the y-value when x=-4 for Function Z.This answer is incorrect. e. The y-intercept of Function W is less than the y-intercept of Function Z. Selected: f. The slope of Function W is greater than the slope of Function Z.

b. The y-value when x=-4 for Function W is equal to the y-value when x=-4 for Function Z. c. The slope of Function W is less that the slope of Function Z. e. The y-intercept of Function W is less than the y-intercept of Function Z.

The picture shows the beginning of a racetrack for a toy car. Which graph models the estimated speed of the toy car as it moves through the racetrack.

b. square like rigid sides

Rory is creating a diagram to prove that a certain triangle is a right triangle. In his diagram he uses three white quadrilaterals that are squares. Which diagram could be the one that Rory is creating?

c, b, c^2 - b^2

What is the volume of the cone (in terms of pi), in cubic feet?

d. 16 pi

square root of 36 to the 3rd power

x^3 = 36

In the equation: 1/5(2x-10)+4x = -3(1/5x+4), _ is the solution! (Just type the number)

-2

Use the systems of two linear equations graphed below to determine the solution.

( -5,-4 )

Liz saw the number shown on the calculator screen. Which number represents the number Liz saw?

0.0000006

Determine each angle measurement 1. m<c 2. m<d 3. m<e 4. m<f 5. m<g 6. m<h

1. 50 2. 130 3. 130 4. 80 5. 50 6. 50

1. 4x + 7y = 12 2. y = (2x + 5)^2 3. y = 10x^3 4. y = 5x -3 5. y = x/2 6. y = 2x^2 + 1

1. Linear 2. Nonlinear 3. Nonlinear 4. Linear 5. Linear 6. Nonlinear

Rational or Irrational 1. -4/3 2. square root of 121 3. 16.121314.... 4. 0.007111111 5. square root of 3

1. Rational 2. Rational 3. Irrational 4. Rational 5. Irrational

1. y = -x 8y = -8x 2. y = 3x + 1 y = -4 3. y = 3x + 2 y = 3x

1. infinite solutions 2. one solution 3. no solution

What is the length from a to c in centimeters.

12 cm

In the equation: 9(3-2x) = 2(10-8x), _ is the solution! (Just type the number)

3.2

The population of the U.S. is 3 x 108. The population of the earth is 9 x 109. This means the earth's popluation is _ times larger than the U.S. population. (It is not necessary to type your answer in scientific notation.)

30 times bigger

A. The data suggests a linear relationship between the number of hours the pool has been draining and the number of gallons of water remaining in the pool. Assuming the relationship is linear, what does the rate of change represent in the context of this relationship? B. What does the y-intercept of the linear function represent in the context of this relationship? C. Which equation describes the relationship between the time elapsed and the number of gallons of water remaining in the pool?

A. B. C. y = -600x + 14800

Rectangle EFGH is dilated with its center at the origin and a scale factor of 3. The dilation is then rotated 90 degrees clockwise about the origin to create rectangle E'F'G'H'. What are the coordinates of the vertices of rectangle? E = (-3,-1) F = (1,3) G = (3,1) H = (1,-3)

E' = (-3,9) F' = (9,-3) G' = (3,-9) H' = (-9,3)

Which point on the number line is the best approximation for the square root of 6?

Point W

What are the two transformations that were performed on Figure 1 to become Figure 3?

Reflection across the x-axis A rotation 90 degrees clockwise about the origin

What are the two transformations that were performed on Figure 1 to become Figure 2?

Reflection across the x-axis A translation 3 units to the right

A relationship between x and y is defined by the equation, y = -4/3x + 1/3, where x is the input and y is the output. Which statements about the relationship are true?

The graph of a relationship is a line When the input is -2, the output is 3

Eric planted a feeling in his garden and recorded its height each week. The equation h = 3/4w + 9/4 can be used to estimate the height, h, in inches, of the seedling after w, weeks since Eric planted the seedling. What does the slope of the graph of the equations h = 3/4w + 9/4 represent?

The increase in height, in inches, of the seedling each week

A baseball coach places baseballs in a cart. He uses the baseballs to pitch to the players during practice. The number of baseballs remaining in the cart after different practice lengths, in minutes, are displayed in the scatter plot below.

The scatter plot shows a negative association because as the practice length increases, the number of baseballs in the cart decreases.

The diagram below shows triable JKL and triangle MNP. Which statement about the slopes line JL and line MP is true.

The slope of the line JL is the same as the slope of line MP because of triangle JKL is similar to triangle MNP.

Male Female Total Walk 34 46 80 Car 28 17 45 Bus 15 12 27 Bike. 52 17 69 Total 129 92 221 a. What percentage of 9th grade girls walk to school? _ b. What percentage of all 9th graders are girls who walk to school? _

a. 42.92 b. 36.8