Shannon mary and john earn a weekly allowance shannon earns an amount that is 2/3 of what john earns mary earns an amount that is 1 2/3 of what john earns john earns $20 a week who earns the greatest amount and who earns the least amount

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