SOLUTION: two cars star at the same point ˏ and travel opposite direction . ∩ne car travela 5 miles per hour faster than the othercar .After 4 hours the two cars are 420 miles a

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Question 814703: two cars star at the same point ˏ and travel opposite direction . ∩ne car
travela 5 miles per hour faster than the othercar .After 4 hours the two cars are
420 miles apart .Find the speed of each car.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

∩ne car travels 5 miles per hour faster than "speed "x" of the other car

in the opposite direction

After 4 hours the two cars are 420mi apart

 4x + 4(x + 5mph) = 420mi

   8x = 400

    x = 50mph, speed of slower car, faster car's speed is 55mph

CHECKING our Answer***

 4%2A50mph+%2B+4%2A55mph+=+420mi