SOLUTION: a car traveled 1350 mi at a certain speed. if the speed had been 9 mph faster, the trip could have been made in 5 hr less time. find the speed

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Question 1010012: a car traveled 1350 mi at a certain speed. if the speed had been 9 mph faster, the trip could have been made in 5 hr less time. find the speed
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D uniform travel rates rule 


             speed        time        distance
DONE          r            t           d
IF           r+k           t-h         d

system%28rt=d%2C%28r%2Bk%29%28t-h%29=d%29
Solve for unknowns t and r.