Math I Mixed Review 2 ~ Use Desmos

What is the value of x in this equation?

6x – 4(x – 9) = 2(3 – x)

Answer explanation

Tags

CCSS.8.EE.C.7B

Two functions are shown.

f(x) = 64(0.5)^x

g(x) = 20x + 12

What is the value of f(6) + g(4)?

Answer explanation

Tags

CCSS.HSF-BF.A.1B

Answer explanation

Tags

CCSS.HSF-LE.A.1A

A function is shown.

f(x)=-0.6x + k

If f(28) = –16, what is the value of k?

Answer explanation

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Karen dropped a ball from different heights. This table shows the height from which she dropped the ball and the height of the ball’s first bounce.

What was the average rate of change in the bounce height as drop height changed from 20 inches to 50 inches?

• 0.90

• 0.85

• 0.60

• 0.25

Answer explanation

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

What is the solution to the inequality shown?

3m + 5 > 2(m – 7)

• m > 12

• m > 19

• m > –12

• m > –19

Answer explanation

This table shows the cost (y) for mailing a package. The customer is charged an initial fee for mailing the package. An extra charge is added based on the weight of the package (x).

What does the value of the slope represent when the data in the table are modeled using a linear function?

• the package weight

• the total mailing cost

• the cost per pound

• the initial fee

Answer explanation

Slope represents the rate.

Y-intercept represents the intial or starting amount.

Tags

CCSS.HSF.LE.B.5

A function is shown.

f(x) = 50,900(1.03)^x

To the nearest whole number, what is the average rate of change of the function over the interval from x = 10 to x = 25?

• 2,028

• 2,545

• 2,659

• 3,028

Answer explanation

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

A line passes through the points (k, 6) and (3, –6). The line is parallel to the graph of 5y + 4x = 8. What is the value of k?

• 0.5

• 2

• 8

• -12

Answer explanation

• $m\le-5$

• $m\ge-5$

• $m\le\frac{-52}{\ \ 49}$

• $m\ge\frac{-52}{\ \ 49}$

Answer explanation