Which one doesnt belong. 2 1 3 5

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?