Use the exterior angle theorem to find the measure of each angle. Help I don’t really understand what to do I try to do step by step I still don’t understand.

21

jk it's 20

step-by-step explanation:

alaska, florida, nevada, south dakota, texas, washington and wyoming, tenessee and new hampshire.

step-by-step explanation:

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb