Question 1183195
.
holly {{{highlight(cross(leave))}}} <U>leaves</U> 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? 
~~~~~~~~~~~~~~~~~



<pre>
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 = {{{175/70}}} = 2.5 hours = 2 hours and 30 minutes.    <U>ANSWER</U>
</pre>

Solved.