Let y represent the total cost of publishing a book (in dollars). Let x represent the number of coples of the book printed. Suppose that x and y are related by the equation 1250 +15x = y.

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?