Answer:
Step-by-step explanation:
3x and 3y are not "like terms," despite having the same coefficient.
Like terms have the same variable. For example, 3x and 2x are like terms, so
3x+2x = 5x
Answer:
A plane figure with 4 sides is called a quadrilateral.
Step-by-step explanation:
Answer: the answer to this is 5n
