Step-by-step explanation:
5)
180-116=64
4y+(7y+6)+64= 180
4y+7y+6+64=180
11y+70= 180
11y= 110
y= 10°
m<C = 40°
m<D= 76°
m<DEC=64°
6)
180-161=19°
18z+3+5z-3+19=180
23z= 161
z=7°
m<L=129°
m<M=32°
m<LKM=19°
