A room is 9.2 m by 7.8 m. How many containers of glue must be ordered to fasten down the floor (only full containers can be ordered). Each container will fasten down 17 m2

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm