If a = 9 and b= 3, what is 15b + a 2 square?

Which order pair could be removed so that the set of order pairs is a function

Through non-collinear points there is exactly one plane.

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