Which phrases can be represented by the algebraic expression 2x + 1? Check all that apply.

In 2x + 1, x is multiplied by 2, then 1 is added. “Two times a number plus 1,” “twice a number and one,” and “double a number added to 1” all describe that expression. “A number plus 2” is x + 2, while “two more than a number and one” does not clearly mean twice the number plus 1.

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