20=2(r+7)
i need with this equation

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me