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the total drive is 450 miles, mila drives x mph for the first 200 miles, for the remaining distance she drives x + 30 mph

Respuesta :

alex255489
First part of the trip:
Time taken= 200/x

Second part of the trip:
Time taken= 250/(×+30)

Average:
Time taken= 450/30
Time taken= 15 hours

200/x + 250/(×+3) = 15
-15x^2+405x+600=0
x=28.40805152

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