Pls help I have 5 minutes left

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2