Can someone help me with this 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

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?