SOLUTION: Two planes just took off from Boston Ma the first plane is traveling 1.5 times as fast as the second plane . After traveling in the same direction for 9 hours they are 387 miles a

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Two planes just took off from Boston Ma the first plane is traveling 1.5 times as fast as the second plane . After traveling in the same direction for 9 hours they are 387 miles a      Log On


   

Question 1101073: Two planes just took off from Boston Ma the first plane is traveling 1.5 times as fast as the second plane . After traveling in the same direction for 9 hours they are 387 miles apart . What is the average speed of each plane ?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
                SPEED       TIME    DISTANCE
THEOTHER           r         9
FIRST             3r/2       9
DIFFERENCE                                387


9%283%2F2%29r-9r=387
-
3r%2F2-r=43
r%2F2=43
highlight%28r=86%29-------second plane