Write an expression for the # of feet in x inches

The function show two sisters' savings account and the rate at which they plan to deposit money

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

Which of the following graphs could represent a quartic function?