Answer: Polynomials cannot contain division by a variable.
Explanation:
Everything in Earth's system can be placed into one of four majorsubsystems: land, water, living things, or air. These four subsystems are called “spheres.” Specifically, they are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air). Each of these four spheres can be further divided into sub-spheres.
