Help please

To prove p is equal to q using an indirect proof what would your starting assumption be?

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.

If a is a nonzero real number then the reciprocal of a is