olivia marked 15 frogs the first time back she caught 7 frogs and 2 marked the next time she got 9 frogs and 3 marked the last time she got 8 frogs and 3 what is the pop help plz

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?

Answer each of the questions for the following diagram: 1. what type of angles are these? 2. solve for x. what does x equal? 3. what is the measure of the angles?

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.