dareal1 dareal1

09-12-2019
Mathematics

contestada

Diane averages 10 mph riding her
bike to work. Averaging 40 mph
on the way back home by car, she
takes hour less time.
How far does she travel
to work?

Respuesta :

brittonjessica brittonjessica

09-12-2019

Answer:

20 miles

Step-by-step explanation:

d miles × (1 h)/(10 miles) = d/10 hours

d miles × (1 h)/(40 miles) = d/40 hours

d/40 = d/10 - 3/2

d = 4d - 60

d = 20 miles

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