Answer
86 Dollars
Explanation:
It is given that

Since,x is the number of miles the car is towed which in this case is 7
So, If we input 7 in the function C(x)

We know through BODMAS that multiplication is done before addition.
Thus,

and so,

and so,
c(7) = 86
We also know that C(x) is the cost of having the car towed which is equal to 86 for the case of towing the car 7 miles
Thus,The cost of having the car towed 7 miles is 86 Dollars