Please help this last one and I’ll be passing math (last option is 32 feet btw)

Can someone me with my hwplz(only the circled ones)

Arectangular exercise mat has a perimeter of 36 feet the length of the mat is twich the width writeand solve an equation to determine the length in feet. of the mat then find the area in square feet of the mart

Solve the equation by completing the square. x^2+2x=17