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OpenStudy (anonymous):
Two airplanes left the same airport traveling in opposite directions. If one plane averages 400mph and the other averages 250mph, in how many hours will the distance between the two planes be 1625 miles?
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OpenStudy (anonymous):
combined rate is 250 + 400 = 650 mph
OpenStudy (anonymous):
and time is distance divided by rate
OpenStudy (anonymous):
thanks
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