The length of a rectangle is (12-4x) units. the perimeter of the rectangle is 42-8x+4y units. part a describe how you con find an expression for the width of the rectangle. part b write a simplified expression to represent the width, in units, of the rectangle.

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?

The anwser cause i do not understand just plez

Factor the polynomial, if possible. if the polynomial cannot be factored, write prime. 9n^3 + 27n^2 – 25n – 75