how do i solve this

Question

Mr. and Mrs. Gomez are buying a carpet for their square shaped bedroom which measures 7yd long each wall. the carpet is $21 per square yard and padding and installation is another 5 per square yard. how much will they spend in all?

 

Answer 1

The area of the bedroom is

A=7yd^2

 

The total cost is the sum of the price rates times this area. 

 

C=A•($21+$5)/yd^2

 

where C is total cost. 

 

C=7yd^2•($21+$5)/yd^2

C=$182