Triangle pqr has vertices p(-2,8), q(2,4), and r(4,6). which best describes triangle pqr? a. a right triangle with pq perpendicular to qr b. a right triangle with pq perpendicular to pr c. an isosceles triangle with pq congruent to qr d. an isosceles triangle with pq congruent to pr

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?