Need a quick answer please

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

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319