Definition/Procedure Example Step 3: Translate the information that appears in English into an algebraic equation. The formula for the perimeter of a rectangle is P 2l 2w Substitute the known values and expressions into the formula. P 2l 2w 132 2(w 6) 2w Substitute. Step 4: Solve the equation. 132 2(w 6) 2w 132 2w 12 2w Distribute. 132 4w 12 Combine like terms. 132 12 4w 12 12 Subtract 12 from each side. 120 4w Combine like terms. 120 4 4w 4 Divide each side by 4. 30 w Simplify. Step 5: Check the answer and interpret the meaning of the solution as it relates to the problem. The width of the poster board is 30 in. The length is w 6 30 6 36 in. The answer makes sense because the perimeter of the poster board is 2(36 in.) 2(30 in.) 72 in. 60 in. 132 in. (4.1) Name each of the numbered angles in the figures in two different ways. 1) Z B G A X 2 1 3 4 2) S L Q R M 1 2 3 4 Classify each angle as acute, right, obtuse, or straight. 3) J F U 4) U H S 5) R K G 6) H F L Classify each pair of lines as parallel, perpendicular, or neither. If they are parallel or perpendicular, use the appropriate notation. 7) y 8) z A B C D Chapter 4: Review Exercises www.mhhe.com/messersmith CHAPTER 4 Review Exercises 349
messersmith_power_prealgebra_1e_ch4_7_10
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