Adrawer is filled with 9 black shirts, 6 white shirts, and 4 gray shirts. one shirt is chosen at random from the drawer. find the probability that it is not a gray shirt.

15/19 is the answer because if you add all the t-shirts you get 19. Subtract 4 and you get 15 that's the number of t-shirts you would have a possibility of drawing that is not grey.   The answer is 15/19

shift 4 units up, and 1 unit left.

it will translate f(x) = 3^x to g(x) = 3^(x+1) + 4