Someone answer this math

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.

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Factor this polynomial completely x^2-64