SOLUTION: A rental car costs $25 plus a fixed charge per mile driven. The total charge for 320 miles of use was $89. Write an equation for the cost, C(in dollars), in terms of the miles driv

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A rental car costs $25 plus a fixed charge per mile driven. The total charge for 320 miles of use was $89. Write an equation for the cost, C(in dollars), in terms of the miles driv      Log On


   

Question 152558: A rental car costs $25 plus a fixed charge per mile driven. The total charge for 320 miles of use was $89. Write an equation for the cost, C(in dollars), in terms of the miles driven ,x.
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
You're eqn will come up:
$Rental charge + ($Rate)(No. of miles driven) = $ Cost
Showing this in figures: x=dollar%2Fmile, C=costin dollars
$25+ ($x/mile)(no. of miles driven) = $Cost
$25 +($x/mile)(320 miles)= $89 ------------------> eqn 1
%28x%2Fcross%28mile%29%29%28320cross%28miles%29%29=89-25
x=64%2F320
x=$0.20
There you go the rental car charge $0.20/mile driven plus $25 flat rate
In doubt? go back eqn 1:
25%2B%280.20%2Fcross%28mile%29%29%28320cross%28miles%29%29=89
25%2B64=89
89=89
Thank you,
Jojo