Determine whether or not they are functions or not. please do all 6 if you can?

5/6+7/8what is the answer sealsdbdbshd

Which number produces a rationale number when multiplied by 1/5

Which points are solutions to the linear inequality y < 0.5x + 2? check all that apply. (–3, –2) (–2, 1) (–1, –2) (–1, 2) (1, –2) (1, 2)