Sasha drove from her house to the grocery store in 20 minutes. her return trip took 15 minutes. if the store is 7 miles from her house, what would sasha's average speed for the round trip in miles per hour?

Sasha drove from her house to the grocery store in 20 minutes.
Her return trip took 15 minutes. IF the store is 7 miles from here house.
Find Sasha’s average speed for her round trip in miles per hour.
=> 20 minutes + 15 minutes = 35 minutes
=> 35 minutes is the time of her travel.
=> 7 miles is the distance.
We need to solve for the average speed.
Formula = Speed = distance / time
=> 7 / 35
=> 0.2
thus, her speed is 0.2 miles per minute (.2miles/min)

Hello!
your answer should be c