An arithmetic sequence has a common difference of 2, and contains the value 86 at some point in the sequence. Which of the following explicit formulas could represent this sequence?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me