The floor of a small foyer will be made from square ceramic tiles. each tile has a side length of 7 inches. if the dimensions of the foyer floor are 28" x 42", how many ceramic tile's are needed?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2