Try C, i am not completely sure but i tried
Answer:
Step-by-step explanation:
α and β are Supplementary (given)
It is given that:
Plugging the value of α in equation (1), we find:
So,

Step-by-step explanation:
2x+98=180° (angles in straight line )
2x=180-98
x=2/2
x=1
18/1
36/2
72/4
...and many more....
Answer:
41
Step-by-step explanation:
first you do 21×2 and that's literally it