What is 45% of 62 please help

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Find an equation for the linear function which has slope -10 and x-intercept -7

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?