Simplify the expression. What classification describes the resulting polynomial?

(x2 + 7x) + (2x2 − 7x)

A.
linear monomial
B.
linear binomial
C.
quadratic binomial
D.
quadratic monomial

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.