Can you explain how to get the answers show work please thank you

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.

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

For which pair of functions is (gof)(a)=|a|-2?