Which of the following are monomials? Check all that apply.
Monomials are algebraic expressions consisting only of one term.
A) x^23 is a monomial
B) 2x + 2 is NOT a monomial; it has 2 terms
C) 19 is a monomial
D) 13^9 + 12 is NOT a monomial; there are two terms but they can be combined into one single number
E) x^9 + y^9 is NOT a monomial- it has 2 terms
F) y is a monomial