Luisa bought a dozen donuts for a class party. the donuts cost $7.98 plus she was charged an
additional 6% tax. how much did luisa pay for the donuts including tax?

Solve the x in the equation x^2+14x+17=-96

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)

Abag contains pieces of paper numbered from 5 to 9. a piece of paper is drawn at random. what is the theoretical probability of drawing a number less than 8?