What is the general form of equation 4x-3y=9

Factor the polynomial 8y^2 - 72 btw "^" means exponent

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)