)) is -68 – -9 positive or negative?

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.

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

See attachment below and find the equivalent of tan(∠qsr)