Answer:
the slope is undefined
Step-by-step explanation:
in the slope equation rise/run you can't divide by 0
45?
9x - 77 = 7x - 43
2x - 77 = -43
2x = 34
x = 17
9(17) - 77 = 153 - 77 = 76
7(17) - 43 = 119 - 43 = 76
z + 76 = 180
z= 104