Answer:
7. Always, Veritcal Angle therom
8. Never true, it will never add up to 180 degrees
9. Never true, it will never add up to 90 degrees
10. Never true, Angle 8 and 5 are not vertical with one anouther.
11. Sometimes
12. Yes it is possible.
x+9= 12 yes x = 3
4 + X= 9 no x = 5
X x 5 = 18 no x = 3.6
21 / x= 7 yes x= 3
hope this helps
220 = b - 99
309 = b
