SOLUTION: Please help me 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 fun

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Please help me 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 fun      Log On


   

Question 1183191: Please help me
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=0.40M+17.75, 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=0.25 M +4.80.
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.
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
S = .4M + 17.75
I = .25M + 4.80

C = S + I = .4M + 17.75 + .25M + 4.80

combine like terms to get:

C = .65M + 22.55

that's the total charge that includes the standard charge plus the insurance charge.