Sagot :
Answer:
a. x=10
b. m<him=105°
c.m<hit=70°
Step-by-step explanation:
a. 180= (9x+20)(6x+10)
180-20-10=15x
150=15x divide by 15
10=x
b m<hin= 9x+20
x= 10
m<hin= 9x+20
= 9(10)+20
= 90+20
= 110°
c m<hit= 6x+10
x= 10
m<hit=6x+10
=6(10)+10
=60+10
=70°