Factor. x^2-2x-3 please

Geometry answer picture question pls . reason and statements

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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?