What are the formulas for the cost of driving cars rented from companies A,B,C? - Company A charges 20 cents per miles plus $20/day - Company B...

The
formual for total cost of driving cars rented from companies A,B,and C must be
determined.

So let,

x  - be the number of miles the car
travels.

y  - the number of days the caris rented and

Z -
the total cost of driving rented cars from each company.

Since the total cost
depends on the miles travelled by the car and the days rented, the genral formula is:

Total Cost=(Cost per...