SOLUTION:
. If you drive the first 80 miles of a 200 mile trip at a rate of 64mph and the remainder of the trip at a rate
50mph, what is your average speed for the entire trip?
Algebra.Com
Question 670517:
. If you drive the first 80 miles of a 200 mile trip at a rate of 64mph and the remainder of the trip at a rate
50mph, what is your average speed for the entire trip?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
represent the elapsed time for the first leg of the trip. Calculate the value of by dividing the distance of the first leg by the speed of the first leg. Likewise, calculate 
, the elapsed time for the second leg, by dividing distance by speed. Note, you are not given the distance of the second leg directly; you must calculate by subtracting the distance of the first leg from the total distance of the trip.
Once you know the elapsed time for each leg of the trip, you can calculate the total time for the trip by adding the two times you just calculated. The average speed for the entire trip is the total distance divided by the total time.
John
My calculator said it, I believe it, that settles it
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