Please help I don't know how to do and its very urgent!

Step-by-step explanation:
42° + x = 115° (alternate angles)
x = 115° - 42°
x = 73°
y = 180° - (115° + 42°) (by angle sum property of triangle)
y = 180° - 167°
y = 13°
z = 42° (corresponding angles)