Please answer this. It's due today.

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

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

What is the result of adding the system of equations? 2x+y=4 3x-y=6