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You are 420 miles from home and you are driving toward home at an average rate of 60 miles per hour. The distance d (in miles) away from home after t hours is given by the function d = 42-60t.

User Ozlem
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1 Answer

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I don't know your question but I think you are finding total time so...

d=60t

420=60t

t=7


User Ryan Walton
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