Question

answer the question......

Answer 1

did this helped you. then OK.

Answer 2

x + y = 180° (angle opposite to transversa is 180°)
5x + 4x = 180°
9x = 180°
x = 20°

angle x = 5 × 20° = 100°
angle y = 4 × 20° = 80°

angle z = angle x ( altrnate interior angle )
angle z = 100°