Question

A carpet costs $15 per square metre. The total delivery charge is $21. Peter buys n square metres of carpet. Select the expression which represents the total cost in $.

Answer 1

Given:

The cost carpet per square meter = 15$

The total delivery charge = 21$

To find:

The expression which represents total cost in $

Calculation:

Peter buys n square meters of carpet. So the costvof n square meters of carpet will be

Cost of n square meters of carpet = (n×15)$

Total cost = Cost of the carpet for n square meters + Delivery charges

                 =  (15n + 21)$

The expression which represents the total cost in $ is 15n+21