HELP PLEASE BOTH DUE SOON

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.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12