which of the following steps could be used to solve by substitution? 6x + 2(β2x + 1) = 22 β2x + 1 = 6x + 2y 6(β2x + 1) + 2y = 22 6(y = β2x + 1)
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?