Lesson 22 Review

Brian runs 7 km each day. Write an equation that models the total km, k, Brian runs over d days.

• $k=7+d$

• $k=7-d$

• $k=7d$
  

• $k=\frac{7}{d}$

A pool designer constructs a frame for an in-ground pool. The width of the border frame, f, is 0.75 feet greater than the width of the pool, p. Write an equation that models the width of the border frame with respect to the width of the pool.

• $f=p+0.75$

• $f=p-0.75$

• $f=0.75p$

• $f=\frac{0.75}{p}$

To rent a car, there is a flat fee of $50, pus $32 per day. Write an equation that models the total cost, c, for renting the car for d days.

• $c=32d-50$

• $c=32d+50$

Franklin is traveling with his family on a road trip. The table shows the number of miles, m, traveled over n hours. Write an equation that models the total distance traveled with the respect to the time traveled.

• $m=130n$

• $m=2n$

• $m=65n$

Gracie can type 240 words in 6 minutes. Based on her typing rate, write an equation that can be used to predict the number of words, w, Gracie can type in n minutes.

• $w=40n$

• $w=240n$

A little league team hits the ball approximately 15 times in 5 innings. Write an equation that could be used to predict the number of hits, h, the team has after n innings.

• $n=3h$

• $n=15h$

• $h=3n$

• $h=15n$

Delilah babysits a fixed number of hours per week. Her friend Laura babysits 5 hours more per week than Delilah. Write an equation that models the total number of hours Laura babysits.

• $l=\frac{d}{5}$

• $l=5d$

• $l=d-5$

• $l=d+5$