Math
posted by Rony .
The weekly rental cost of a 20 foor recreational vehicle is $129.50 plus $0.15 per mile.
Find a linear function that express the cost C as a function miles driven m.
 What is the rental cost if 860 miles are driven?
How many miles were driven if the rental cost is $213.80?

Start by writing an equation
Total cost = (Fixed cost) + (Mileage charge)*(Number of miles)
Choose appropriate symbos for your terms such as
T = F + M N
in which case F would be $129.50 and M would be 0.15
Solve the equation for T when N = 860
Solve the equation for N when T = 213.80
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