Can someone help with this, please?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

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?

Which of the following graphs could represent a quartic function?