!!!HELP ASAP!!!In the diagram below, P is circumscribed about quadrilateral ABCD. What is
the value of x?

Answer:
D
Step-by-step explanation:
The opposite vertices of a cyclic quadrilateral are supplementary, that is
x + 10 + 88 = 180
x + 98 = 180 ( subtract 98 from 180 )
x = 82 → D