SOLUTION: holly leave her beach house by car and drives backto her home. her distance d kilometers from her home after t hours is given byd = 175 -70t How long does it take to reach her h

Question 1183195: holly leave her beach house by car and drives backto her home. her distance d kilometers from her home after t hours is given byd = 175 -70t
How long does it take to reach her home?
Answer by ikleyn(52777) (Show Source): You can put this solution on YOUR website!
.
holly leaves her beach house by car and drives back to her home.
her distance d kilometers from her home after t hours is given byd = 175 -70t
How long does it take to reach her home?
~~~~~~~~~~~~~~~~~

The criterion getting home is  d = 0.


In other words, the time to get home is the solution "t" of the equation

    175 - 70t = 0.


From the equation,

    175 = 70t

      t =  = 2.5 hours = 2 hours and 30 minutes.    ANSWER

Solved.

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