SOLUTION: On a 130 mile trip, a car traveled at an average speed of 55 mph and then reduced its speed to 40 mph for the remainder of the trip. The trip took a total of 2.5 hours. For how lon

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Question 58490: On a 130 mile trip, a car traveled at an average speed of 55 mph and then reduced its speed to 40 mph for the remainder of the trip. The trip took a total of 2.5 hours. For how long did the car travel at 40 mph?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
55X+40(2.5-X)=130
55X+100-40X=130
15X=130-100
15X=30
X=30/15
X=2 HOURS @ 50 MPH
THE 2.5-2=.5 HOURS @ 40 MPH
PROOF
55*2+40*.5=130
110+20=130
130=130