Need with solving a problem with elimination method

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

What is the graph of the function fx x+2/x-3?