SOLUTION: Kelsey biked from the mall to the movie theater at an average speed of 66 miles per hour, and then biked back the same way at an average speed of 88 miles per hour. If the round tr

Question 1092561: Kelsey biked from the mall to the movie theater at an average speed of 66 miles per hour, and then biked back the same way at an average speed of 88 miles per hour. If the round trip took 2 hours and 15 minutes, how many miles is Kelsey's one-way trip from the mall to the movie theater?
Round to the nearest hundredth.
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
Let d be the distance between the mall and the movie theater. Then:
d/6 + d/8=2.25
4d+3d=54
7d=54
d=7.714 miles
d/66 + d/88=2.25
4d+3d=594
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