Question

A car rental costs $50 for the first day. Additional days cost $35 per day, unless the car is rented for 7 days or more, in which case there is a 10% discount on the daily rate. Identify the expression which represents the cost of renting a car if the car has been rented for more than a week.

Answer 1

`\$50+\$31.5x`

Explanation:

Let

x------> the number of days

y----> the cost of renting a car

we know that

For
`x<7\ days`

`y=\$50+\$35x`

For
`x\geq 7\ days`

The rate is equal to

`0.90*\$35=\$31.5`

so

`y=\$50+\$31.5x`

In this problem. the car has been rented for more than a week

therefore

`x> 7\ days`

The cost of renting a car is equal to

`y=\$50+\$31.5x`