A rectangle is graphed on the coordinate grid. Which equation represents a side that is perpendicular to side d?
A) y=2x +5
B) y=-2x +5
C) y= 1/2x -5/2
D) y= -1/2x -7/2

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

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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?