The length of a rectangle is 2 less than two times the width. Perimeter is 42. Find the length and the width.

Find equation of line with slope equals 8 and passing through (6,53)

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?

How can you construct perpendicular lines and prove theorems about perpendicular lines