SOLUTION: Marina drove 288 miles in the same amount of time it took Jamie to drive 312 miles. If Jamie drove 6 miles per hour faster than Marina, at which speeds were Jamie and Marina travel
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Question 742264: Marina drove 288 miles in the same amount of time it took Jamie to drive 312 miles. If Jamie drove 6 miles per hour faster than Marina, at which speeds were Jamie and Marina traveling? Answer by checkley79(3341) (Show Source):
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288=XT OR T=288/X
312=(X+6)T
312=(X+6)(288/X)
312=288X/X+1728/X
312=288+1728/X
312-288=1728/X
24=1728/X
24X=1728
X=1728/24
X=72 MPH. SPEED FOR MARINA.
72+6=78 MPH FOR JAMIE,
288=72T
T=288/72
T=4 HOURS ANS.
PROOF:
312=(78*4)
312=312
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