Which of the following is an algebraic expression?, 5 + 7, 2x + 5, 18 ÷ 3, In 5x + 8, what is the variable?, 5, 8, x, In 5x + 8, what is the coefficient?, 5, x, 13, In 7y − 9, what is the constant?, 7, 9y, −9, How many terms are in 3x + 4?, 3, 4, 2, Evaluate 2x + 3 when x = 4., 9, 11, 12

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