Math Maintenance Lesson 86

Ray has a library fine of $1.15. How much does he have to pay the library so that he has a $0 balance?

• $1.15

• -$1.15

Expand this expression:

4(5n + 3t - 6)

• 20n + 12t - 24

• 60nt

• 20n + 12t - 6

Kelly wants to find out if the townspeople would be in favor of creating a local dog park. She polls and equal number of people from several age groups and dform different areas of town. Is the study likely to yield a valid result?

• Yes

• No

Solve:

16(-2) + (-8) = ?

• -40

• 40

• -24

The relationship between the number of plums (p) and the cost in dollars (c) is represented by the equation c=0.32p. Give the unit rate and constant of proportionality.

• 0.32

• 0.23

• 0.15

Find the value of m:

(Think 2m=48)

• 24

• 48

• 90

 Find the radius of a circle that has an area of  $144\pi ft^2$  
(Think: x squared = 144)

• 12 feet

• 13 feet

• 10 feet

A bag holds baseball bats of different lengths. There are five 24-inch, three 25-inch, and six 26-inch bats. When Santino grabs a bat at random, how likely is he to choose a 24 inch bat? (Think probability)

• $\frac{6}{14}$

• $\frac{5}{14}$

• $\frac{3}{14}$

Kendra had a birthday party at the bowling alley. She paid $23 for pizza and covered the cost of bowling at $6.50 per person. How many friends did Kendra invite to her party if she spent $75?

• $52

• $8

• $22