1.
Enrique competed in a 47-mile bicycle race last year. He completed the race in 2 hours 34 minutes. This year he would like to complete the race in 2 hours 30 minutes. How many miles per hour should Enrique ride to complete the race in 2 hours 30 minutes? (Use the formula D = rt)

(1 point)
18.8 mph
21.3 mph
16.8 mph
23.5 mph

Question

1.   
Enrique competed in a 47-mile bicycle race last year. He completed the race in 2 hours 34 minutes. This year he would like to complete the race in 2 hours 30 minutes. How many miles per hour should Enrique ride to complete the race in 2 hours 30 minutes? (Use the formula D = rt)

 (1 point)
18.8 mph
21.3 mph
16.8 mph
23.5 mph

anonymous · Answer

D = 47
R = ?
T = 2.5

you are looking for r, so lets change the equation..
D = rt ---> r = D/T
now lets sub in known values...
r = 47/2.5 (now divide)
r = 18.8 mph <--answer :)