This is a really easy question Just need to make sure it is right. Is it B

What is x3+3x2−16x−48 divided by x−1?

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?

3x = 729 solve for x plz . it's urgent. will mark