A car rental company's standard charge includes an initial fee plus an additional fee for each mile driven. The standard charge
S(in dollars) is given by the function
=S+0.50M16.95, where M is the number of miles driven.The company also offers an option to insure the car against damage. The insurance charge I (in dollars) is given by the function=I+0.25M4.80 .
Let C be the total charge (in dollars) for a rental that includes insurance. Write an equation relating
C to M . Simplify your answer as much as possible.

Question

A car rental company's standard charge includes an initial fee plus an additional fee for each mile driven. The standard charge 
S(in dollars) is given by the function 
=S+0.50M16.95, where M is the number of miles driven.The company also offers an option to insure the car against damage. The insurance charge I (in dollars) is given by the function=I+0.25M4.80 .
Let C be the total charge (in dollars) for a rental that includes insurance. Write an equation relating 
C to M . Simplify your answer as much as possible.