What is the method that you use to figure out what the missing angle is in any polygon? bgross get the points fast

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

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?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?