Help Which expression is equivalent?

Write each expression in exponential form and find its value.| ! 2 x 2 x 2 x 2

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

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.