Question

The formula d = rt gives the distance traveled in time t at rate r. A delivery truck drives for 1.5 hours and travels 76 miles.   
What was the average speed of the truck?
a.38 miles per hour
b.50.7 miles per hour
c.74.5 miles per hour
d.114 miles per hour

Answer 1

76=r(1.5)
76/1.5=r(1.5)/1.5
50.7=r

B. 50.7 miles per hour

Answer 2

d = rt
so now you plug in all the numbers with the given information you have
(76) = r(1.5)
start from the variable side
1.5r = 76
1.5r/1.5 = 76/1.5r
r = 50.7
so your answer will be
B.) 50.7 miles per hour