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 $.
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Given:
The cost carpet per square meter = 15$
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
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