135 Square feet length 15 feet how wide should it be

Multiplying an even number of negative numbers gives an answer that is choose from:

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?

What is the slope of the line shown below?