Find the inverse function of y=-2/7+5

Plz need answer now will mark which situations represent linear functions? check all that apply. a)the temperature rises and falls over the course of a day. temperature is a function of time. b)a baseball is hit into the outfield. the height of the ball is a function of time. c)a car goes 55 mph on the highway. distance is a function of time. d)a child grew 2 inches this year and 1 inch last year. height is a function of time. e)a movie director makes 2 movies per year. the number of movies is a function of the years.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Prove that quadrilateral is a rhombus.