Answer:
a. X=30°
b. y=80°
solution,
a.
[tex]x + 60 = 90(sum \: of \: right \: angle) \\ or \: x = 90 - 60 \\ x = 30[/tex]
b.
[tex]y + 100 = 180(sum \: of \: angle \: in \: straight \: line) \\ or \: y = 180 - 100 \\ y = 80[/tex]
hope this helps..
Good luck on your assignment..
Use the hints to your advantage.
a)
x° + 60° = 90°
x = 90 - 60
x = 30°
b)
y° + 100° = 180° (straight line)
y = 180 - 100
y = 80°