Answer:
Z=44° X=114° Y=66°
Explanation:
Angles in a triangle add up to 180
31°+35°+x°=180°
66°+x°=180°
x°=180°-66°
x°=114°
Angles on a line add up to 180°
x°+y°= 180°
where x°=114°
114°+y° =180°
y°=180°-114°
y°=66°
Angles in a triangle add up to 180
z°+y°+70°=180°
where y=66°
z°+66°+70°=180°
z°+136°=180°
z°=180°-136°
z°=44°