Lesson 8: Practice Problems

Problem 1

A pair of designer sneakers was purchased for $120. Since they were purchased, their price has increased by 15%. What is the new price?

Problem 2

Elena’s aunt bought her a $150 savings bond when she was born. When Elena is 20 years old, the bond will have earned 105% in interest. How much will the bond be worth when Elena is 20 years old?

Problem 3

In a video game, Clare scored 50% more points than Tyler. If $c$ is the number of points that Clare scored and $t$ is the number of points that Tyler scored, which equations are correct? Select all that apply.

$c = 1.5 t$
$c = t + 0.5$
$c = t + 0.5 t$
$c = t + 50$
$c = (1 + 0.5) t$

Problem 4 From Unit 4 Lesson 6

Draw a diagram to represent each situation:

The number of miles driven this month was a 30% decrease of the number of miles driven last month.
The amount of paper that the copy shop used this month was a 25% increase of the amount of paper they used last month.

Problem 5 From Unit 4 Lesson 5

Which decimal is the best estimate of the fraction $\frac{29}{40}$ ?

Problem 6 From Unit 3 Lesson 3

Could 7.2 inches and 28 inches be the diameter and circumference of the same circle? Explain why or why not.