Are the following like terms: $9y$9y and $10y$10y?

Yes

No

Are the following like terms: $2xy$2xy and $4yx$4yx?

Which of the following pairs are like terms? Select all that apply.

Simplify the expression: $2a+5a$2a+5a

Add, subtract, factor, and expand linear expressions with rational coefficients by applying the properties of operations.