Geometry! help meh out.

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*