8th grade post exam

Marty has $80 to spend at a sporting goods store. He will spend $56 on a shirt, and then buy some darts. Each box of darts costs $6. He wants to buy as many boxes as possible. Which equation shows how to find the number of boxes of darts, x, he can buy?

• 80 = 56 + 6x

• 80 = 56 − 6x

• 80 = (56)(6x)

• 80 = 56/6x

Which expression represents 4 less than twice a number, n?

• 4 - n

• n - 4

• 4 - 2n

• 2n - 4

What is the value of (2/3 + (-1/6))?

• -1/2

• 1/3

• 1/2

• 5/6

Which expression has a value of -2?

Becky is tossing a six-sided number cube labeled 1, 2, 3, 4, 5, and 6. What is the probability of tossing 6 two times in a row?

• 1/36

• 1/6

• 1/3

• 1/2

Which represents the value of x in 6 - 4x ≤ 26?

• x ≤ -8

• x ≥ -8

• x ≤ -5

• x ≥ -5

Use the table below to answer the question. The table shows the resting heart rates in beats per minute of six students. The rate, 40 beats per minute, seems to be an outlier. Which measure of central tendency changes the least by dropping 40 from the data?

• mean

• median

• mode

• range

The sum of a number, n, and 5 is subtracted from 8. Which expression represents this statement?

• 8 - (n + 5)

• (n + 5) + 8

• (n + 5) - 8

• 8 + (n + 5)

What is the value of w in 0.8w - 7/2 = 1/2?

• w = 3.2

• w = 5

• w = 37.5

• w = 50

How is 0.5600 written in scientific notation?

• 5.6 × 10

• 5.6 × 10^-1

• 5.6 × 10^-2

• 5.6 × 10^-3