Which set of numbers does not include the square root of 25?
a. irrational numbers
b. integers
c. rational numbers
d. whole numbers
explain why

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

If the discriminant if a quadratic equation is 4 which statement describes the roots?

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?