what is the minimum number of points required to mark all maximum, minimum, and zeros in a period of a sinusiod?

Solve for x by completing the square. 2x^2-4x+7=0

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?

Write 5 in the form of a/b using integers to show it as a rational number