SOLUTION: Car A and Car B enter an expressway at the same time and place and head in the same direction. Car A travels at 70 mph. If after 2.5 hours Car B is 50 miles behind Car A, what is

Algebra ->  Human-and-algebraic-language -> SOLUTION: Car A and Car B enter an expressway at the same time and place and head in the same direction. Car A travels at 70 mph. If after 2.5 hours Car B is 50 miles behind Car A, what is       Log On


   

Question 352177: Car A and Car B enter an expressway at the same time and place and head in the same direction. Car A travels at 70 mph. If after 2.5 hours Car B is 50 miles behind Car A, what is the speed of Car B?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

Rate*Time=Distance
70%2At=D%5Ba%5D
R%5Bb%5D%2At=D%5Bb%5D
.
.
.
When t=2.5hrs,
D%5Ba%5D=175 miles
D%5Bb%5D=175-50=125 miles
From above,
R%5Bb%5D%2A2.5=125
highlight%28R%5Bb%5D=50%29 mph