Answer:
option 2 and 6
Explanation:
Given : Monomial

To find : Adding which terms to
would result in a monomial? Check all that apply.
Solution :
Monomial is when the number of terms is only 1.
1)

Adding in given monomial
is a binomial
2)

Adding in given monomial
is a monomial
3)

Adding in given monomial
is a binomial
4)

Adding in given monomial
is a binomial
5)

Adding in given monomial
is a binomial
6)

Adding in given monomial
is a monomial
7)

Adding in given monomial
is a binomial
Therefore, Option 2 and 6 are the terms giving a monomial.