I need help quick i will mark braniliest

The perimeter of a square is80-64y units. which expression can be used to show the side length of one side of the square?

Lassify the function as linear or quadratic and identify the quadratic, linear, and constant terms. f(x) = (3x + 2)(−6x − 3) linear function; linear term: −21x; constant term: −6 linear function; linear term: −18x2; constant term: −6 quadratic function; quadratic term: 6x2; linear term: 24x; constant term: −6 quadratic function; quadratic term: −18x2; linear term: −21x; constant term: −6

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?