SOLUTION: A Car is driven 280 mi. if it had gone 5mph faster, it could have made the trip in 1hr less time. What is the speed?
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Question 286193: A Car is driven 280 mi. if it had gone 5mph faster, it could have made the trip in 1hr less time. What is the speed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Write 2 equations, 1 for each case:
case #1
By substitution:
Substituting again:
can't be negative, so
and
mi/hr
check answer:
OK
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