(3b^3-4b^1-7)(2b^2-b^1-9) *multiplying polynomials*

Nine more than four times a number is the same as one less than twice the number. find the number?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1