Perimeter of a rectangle !

the area of a rectangle is 42yd^2

the length is 5 yards more than twice the width

(so i'm guessing
l=2w+5)

find the dimensions of the rectangle

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Neal buys a board game. he pays for the board game and pays $1.54 in sales tax. the sales tax rate is 5.5%. what is the original price of the board game, before tax