X+y=4
x-y=-6
x-y=7
x+y=1
x and y equal what on both equations
these both are elimination using addition and subtraction.

49xy +34y - 72z. determine the degree of the polynomial

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

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