Which of the following terms describes the 2 in the expression 5x - 3y + 2z + 1?

Write the factored form of this trinomial 9x^2+18x-7

What ratio is proportional to 18/21

Barrett is comparing the membership fees for two museums.the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?