Answer:
Step-by-step explanation:
it is an arithmetic sequence.
c=6-3=3
\[a_{n}=3+(n-1)*3\]
\a_{n}=3n
a_{8}=3*8=24
x+31°=180°
180°-31°=149°
answer
This could be wrong because I'm going into the fifth grade but wouldn't it just be (7,-3)?
