Solve for the variables

How do i do this activity, is appreciated

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)