# math

posted by
**Sara!** on
.

a round trip car ride took 12 hours. the first half of the trip took 7 hours at a rate of 45 miles per hour. what was the average rate of speed on the return trip?

posted by
**Sara!** on
.

a round trip car ride took 12 hours. the first half of the trip took 7 hours at a rate of 45 miles per hour. what was the average rate of speed on the return trip?