Someone help and please make sure it’s right

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.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Is there an x intercept in the equation 60*1.15^x