Is y=3x^2 a function?

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .