How to solve for y 6x+3y=9 and 3x+2y=9

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

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?

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr