Find m∠4 if m∠1 = 100°

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 vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd