Evaluate f(x)=1/2x+3, when x=-7

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.

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Which of the binomials below is a factor of this trinominal? x^2-13+30