Question 607642
Julie drives 110 mi to Grandmother's house.
 On the way to Grandmother's, Julie drives half the distance at 25 mph and half the distance at 85 mph.
 On her return trip, she drives half the time at 25 mph and half the time at 85 mph.
:
Part B
How long does the return trip take?
:
Let 2t = time required for the return trip
:
Write a distance equation; dist = speed * time
:
25t + 85t = 110
110t = 110
t = 1 hrs
therefore
2 hrs to make the return trip