2cos theta = sec theta.. what are they asking me to find?

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 inverse of the function f(x) = 2x + 1?

#7. m is the midpoint of pq, the diameter of the circle o is 13in. and rm = 4in. find pm find pq