I need help writing an equation for this image.

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

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?