SOLUTION: Sandy left Burbank driving 79 miles per hour. Mary, in order to catch up, drove 88 miles per hour. Mary caught up in 8 hours. How long was Sandy driving before Mary caught up? T

Question 974726: Sandy left Burbank driving 79 miles per hour. Mary, in order to catch up, drove 88 miles per hour. Mary caught up in 8 hours. How long was Sandy driving before Mary caught up?
Thank you for your help!
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Sandy left first and Mary left later; but traveled less time than Sandy. Think about that
a while,... and then assign t as the travel time for Sandy BEFORE Mary began her travel.

Each Sandy and Mary travel the same distance, d, upon catch-up.

______________________speed____________time__________distance
Sandy_________________79_______________t+8____________d
Mary__________________88________________8_____________d

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which IS close-enough to 1 hour. Slightly longer.
-
1 HOUR 46 SECONDS

Answer by MathTherapy(10555) (Show Source): You can put this solution on YOUR website!
Sandy left Burbank driving 79 miles per hour. Mary, in order to catch up, drove 88 miles per hour. Mary caught up in 8 hours. How long was Sandy driving before Mary caught up?

Sandy had been driving for hours by the time Mary caught her.
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