Find the distance between each pair of points.

(0, -6) and (-10, -6)

What is the missing step in this proof ?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

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?