I need help fast pleaassee!

Georgia bought a packge of of 14 dollies to use in her valentines.she used 5/7 of the package to make her in valentines. how many dollies did she have left

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.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.