SOLUTION: On Wednesday you drove from home to work at 55 mph and got there in 21 minutes. On Thursday you drove at 67 mph. How long does the trip take on Thursday? How much time did you save

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Question 989125: On Wednesday you drove from home to work at 55 mph and got there in 21 minutes. On Thursday you drove at 67 mph. How long does the trip take on Thursday? How much time did you save by driving 12 mph faster?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
DAY       speed    time      distance
Wed        55      21/60      d
Thrs       67       t         d


Solve d using Wednesday's data; and solve for t using Thursday's equation, data.