i wish that i could help you but I just dont understand it... I am sorry
C. Supplementary
This means their angles add up to 180° which is a straight line
To find the common ratio, u take ur 2nd term, and divide it by ur 1st term
(-1/6) / (5/12) =
-1/6 * 12/5 =
- 2/5 <== ur common ratio
32+n=105
32-32+n=105-32
n=73