<PRE><B>Question 208955</B>
use the expression r + 0.12m to calculate the cost of renting a car.
The basic rate is r. The number of miles driven is m. 
question: The basic rate is $15.95. The car is driven 150 mi.--------------------------------------------
Cost = r + 0.12m
Cost = 15.95 + 0.12(150)
Cost = 15.95 = 18.00
Cost = $33.95
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Cheers,
Stan H.</PRE>