Jenny works in a picture-framing shop. She has a function f(x)=x+2 f ( x ) = x + 2 that finds the size of a square frame, given a picture of side length x x in inches. She has a function p(x)=3x p ( x ) = 3 x that gives the price in dollars for the frame. What is the single function that Jenny can use to give a customer a price for a picture with an edge length of x?