Question

Fancy-dress Costumes are hired out at a price of $20 deposit (non-refundable) plus $2.50 an hour.

Write an expression for the cost, C (in dollars), of hiring a costume for hours.

Answer 1

The expression for the cost, C (in dollars), of hiring a fancy-dress costume for h hours can be given as:

C = 20 + 2.5h

where the fixed cost of the non-refundable deposit is $20, and the variable cost per hour of hire is $2.50.

For example, if you wanted to hire a fancy-dress costume for 4 hours, the cost would be:

C = 20 + 2.5(4) = 20 + 10 = 30

So the cost of hiring the costume for 4 hours would be $30.