Answer:
x=70
y= 30
z= 10
Explanation:
X + 110 = 180 since they form a straight line
Subtract 110 from each side
x+110 -100 = 180-110
x = 70
Y + 110 + 40 = 180 since the three angles of a triangle add to 180
y+150 = 180
Subtract 150 from each side
y+150-150 = 180-150
y = 30
A + B+ C = 180 since the three angles of a triangle add to 180
90 + y+z+ 40 =180
90 + 30+z + 40=180
Combine like terms
170 +z = 180
z = 180-170
z = 10