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Noteables Interactive Study Notebook - McGraw-Hill Higher Education

Noteables Interactive Study Notebook - McGraw-Hill Higher Education

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1–6 Algebra: Variables and ExpressionsMAIN IDEA• Evaluate simplealgebraic expressions.BUILD YOUR VOCABULARY (pages 2–3)You can use a, or variable, in an expression.The expression 7 + n is called anexpression.The branch of mathematics that involves expressionswithTheis called algebra.factor of a term that contains avariable is called a coefficient.EXAMPLES Evaluate ExpressionsEvaluate t - 4 if t = 6.t - 4 = 6 - Replace t with .Copyright © Glencoe/<strong>McGraw</strong>-<strong>Hill</strong>, a division of The <strong>McGraw</strong>-<strong>Hill</strong> Companies, Inc.= Subtract.Evaluate 5x + 3y if x = 7 and y = 9.5x + 3y = 5 · + 3 · Replace x withand with 9.= + Do all multiplications fi rst.= Add and 27.Evaluate 5 + a 2 if a = 5.5 + a 2 = 5 + 5 2 Replace a with .= 5 + Evaluate the .= Add.Math Connects, Course 2 13

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