SOLUTION: At 530 miles, 4.5 hour plane trip was flown at 2 speeds. For the first part of the trip, the average speed was 120 mph. For the remainder of the trip, the average speed was 115 mph

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: At 530 miles, 4.5 hour plane trip was flown at 2 speeds. For the first part of the trip, the average speed was 120 mph. For the remainder of the trip, the average speed was 115 mph      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 802454: At 530 miles, 4.5 hour plane trip was flown at 2 speeds. For the first part of the trip, the average speed was 120 mph. For the remainder of the trip, the average speed was 115 mph. How long did the plane fly at 120 mph?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
R*T=D
x+y=4.5,
120x+115y=530
x=2.5 hours at 120mph, y=2 hrs at 115mph.