What is the lowest positive integer greater than 1, which when divided by 5 or 8 leaves a remainder of 1?

What is the slope of the line shown below?

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?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.