Jessica needs to rent a car while on vacation. The rental company charges $19.95, plus 15 cents for each mile driven. If Jessica only has $40 to spend on the car rental, what is the maximum number of miles she can drive?
miles ?
Jessica needs to rent a car while on vacation. The rental company charges $19.95, plus 15 cents for each mile driven. If Jessica only has $40 to spend on the car rental, what is the maximum number of miles she can drive?
miles ?
The total charge for the miles driven will be .15x, where x is the number of miles that were driven.
The flat rate (19.95) plus the charge for miles driven (.15x) will equal 40.
19.95 + .15x = 40 Formula derived from problem
19.95 + .15x - 19.95 = 40 - 19.95 Subtract 19.95 from each side
.15x = 20.05 Simplify
.15x/.15 = 20.05/.15 Divide each side by .15
x = 133.67 Simplify
Since the rental company will likely round up the miles, Jessica will have to limit her driving to 133 miles.