If triangle NKF is similar to triangle LZF, find NF

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2