SOLUTION: a family drove to an amusement park at 50 mph and returned on the same route at 40 mph. find the distance to the amusement park if the total driving time was 7.2 hours.
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Question 387974: a family drove to an amusement park at 50 mph and returned on the same route at 40 mph. find the distance to the amusement park if the total driving time was 7.2 hours.
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
d=50x
d=40y
50x=40y
50x-40y=0
x+y=7.2
50x-40y=0
40x+40y=288
50x-40y=0
90x=288
x=3.2
x+y=7.2
3.2+y=7.2
y=4
d=50x=50(3.2) = 160
distance is 160 miles
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