Write an equation to show the relationship between the number of hours ,x, and the total number run

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?

Angle that produces maximum distance

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.