Chapter 12 Final Review
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1 Chapter 12 Final Review Simplify the rational expression Multiply Divide Add or subtract Find the LCD of the pair of expressions.
2 Solve the equation. Check your solution A group of college students is volunteering for Homes for the Community during their spring break. They are putting the finishing touches on a house they built. Working alone, Wade can paint a certain room in 7 hours. Rhonda can paint the same room in 5 hours. How long will it take them working together to paint the room? Round your answer to the nearest hundredth if necessary. 38. Write and simplify the rational expression that represents the probability of randomly hitting the unshaded region of the rectangle. Show all of your work. 39. Simplify the following expression. Show your work.
3 Chapter 12 Review Answer Section SHORT ANSWER 1. ANS: TOP: 12-2 Example 1 2. ANS: TOP: 12-2 Example 1 3. ANS: TOP: 12-2 Example 2 4. ANS: TOP: 12-2 Example 2 5. ANS: x 5 TOP: 12-2 Example 3 6. ANS:
4 TOP: 12-2 Example 2 7. ANS: TOP: 12-2 Example 2 8. ANS: NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example 1 9. ANS: PTS: 1 DIF: L3 REF: 12-3 Multiplying and Dividing Rational Expressions NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: PTS: 1 DIF: L3 REF: 12-3 Multiplying and Dividing Rational Expressions
5 NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: OBJ: Dividing Rational Expressions NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: OBJ: Dividing Rational Expressions NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: OBJ: Dividing Rational Expressions NAT: NAEP 2005 A3b NAEP 2005 A3c ADP J.1.5 TOP: 12-3 Example ANS: TOP: 12-4 Example ANS: TOP: 12-4 Example ANS: TOP: 12-4 Example ANS:
6 TOP: 12-4 Example ANS: TOP: 12-4 Example ANS: PTS: 1 DIF: L3 REF: 12-4 Dividing Polynomials TOP: 12-4 Example ANS: TOP: 12-4 Example ANS: TOP: 12-4 Example ANS: OBJ: Adding and Subtracting Rational Expressions With Like Denominators TOP: 12-5 Example ANS: OBJ: Adding and Subtracting Rational Expressions With Like Denominators
7 TOP: 12-5 Example ANS: OBJ: Adding and Subtracting Rational Expressions With Like Denominators TOP: 12-5 Example ANS: PTS: 1 DIF: L3 REF: 12-5 Adding and Subtracting Rational Expressions OBJ: Adding and Subtracting Rational Expressions With Like Denominators TOP: 12-5 Example ANS: OBJ: Adding and Subtracting Rational Expressions With Unlike Denominators TOP: 12-5 Example ANS: 6x 7 y 4 OBJ: Adding and Subtracting Rational Expressions With Unlike Denominators TOP: 12-5 Example ANS: x 6 or 1 PTS: 1 DIF: L2 REF: 12-6 Solving Rational Equations OBJ: Solving Rational Equations NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 2 rational equation 31. ANS: x 2 PTS: 1 DIF: L2 REF: 12-6 Solving Rational Equations OBJ: Solving Rational Equations NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 1 rational equation 32. ANS: x 3 10
8 PTS: 1 DIF: L2 REF: 12-6 Solving Rational Equations OBJ: Solving Rational Equations NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 1 rational equation 33. ANS: x 8 PTS: 1 DIF: L2 REF: 12-6 Solving Rational Equations OBJ: Solving Proportions NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 4 rational equation 34. ANS: x 2 PTS: 1 DIF: L3 REF: 12-6 Solving Rational Equations OBJ: Solving Proportions NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 5 rational equation 35. ANS: x PTS: 1 DIF: L3 REF: 12-6 Solving Rational Equations OBJ: Solving Proportions NAT: NAEP 2005 A4a STA: PA M11.A rational equation 36. ANS: x 2 PTS: 1 DIF: L3 REF: 12-6 Solving Rational Equations OBJ: Solving Proportions NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 4 rational equation 37. ANS: 2.92 hours PTS: 1 DIF: L3 REF: 12-6 Solving Rational Equations OBJ: Solving Rational Equations NAT: NAEP 2005 A4a STA: PA M11.A TOP: 12-6 Example 3 KEY: word problem problem solving rational expression rational equation ESSAY 38. ANS: [4] P
9 [3] one error in computation [2] two computational errors [1] correct answer without work shown PTS: 1 DIF: L3 REF: 12-2 Simplifying Rational Functions KEY: extended response rubric-based question rational expression 39. ANS: [4] [3] one error in computation [2] two computational errors [1] correct answer without work shown PTS: 1 DIF: L4 REF: 12-5 Adding and Subtracting Rational Expressions OBJ: Adding and Subtracting Rational Expressions With Unlike Denominators KEY: extended response rubric-based question rational expression
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