(3x2 + 5y2 – 6xy) + (7x2 + 2xy – 8y?)
I have to simplify. Help please

The class wants to raise a total of $750.if they receive a profit of $1.25 from each candybar sold, how many bars must they sell to reachtheir goal

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?