Can anyone help me? nobody was helpful in my first post :/

Me. i need an answer asap. , you! select the correct answer from each drop-down menu.simplify the given polynomial and use it to complete the statement.the polynomial simplifies to an expression that is a blank with a blank degree of blank .

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

I'm confused on this could anyone me and show me what i need to do to solve it.