Chapter 7 Resource Masters - Math Class

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Chapter 7Resource Masters

CONSUMABLE WORKBOOKS Many of the worksheets contained in the ChapterResource Masters booklets are available as consumable workbooks in bothEnglish and Spanish.Study Guide and Intervention WorkbookStudy Guide and Intervention Workbook (Spanish)Skills Practice WorkbookSkills Practice Workbook (Spanish)Practice WorkbookPractice Workbook (Spanish)Reading to Learn Mathematics NSWERS FOR WORKBOOKS The answers for Chapter 7 of these workbookscan be found in the back of this Chapter Resource Masters booklet.StudentWorks This CD-ROM includes the entire Student Edition text alongwith the English workbooks listed above.TeacherWorks All of the materials found in this booklet are included for viewing and printing in the Glencoe Algebra 1 TeacherWorks CD-ROM.Glencoe/McGraw-HillCopyright by The McGraw-Hill Companies, Inc. All rights reserved.Printed in the United States of America. Permission is granted to reproduce thematerial contained herein on the condition that such material be reproduced onlyfor classroom use; be provided to students, teachers, and families without charge;and be used solely in conjunction with Glencoe Algebra 1. Any other reproduction,for use or sale, is prohibited without prior written permission of the publisher.Send all inquiries to:The McGraw-Hill Companies8787 Orion PlaceColumbus, OH 43240-4027ISBN: 0-07-827731-03 4 5 6 7 8 9 10 024 11 10 09 08 07 06 05 04 03Glencoe Algebra 1Chapter 7 Resource Masters

ContentsVocabulary Builder . . . . . . . . . . . . . . . . viiLesson 7-5Study Guide and Intervention . . . . . . . . 427–428Skills Practice . . . . . . . . . . . . . . . . . . . . . . . 429Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . 430Reading to Learn Mathematics . . . . . . . . . . 431Enrichment . . . . . . . . . . . . . . . . . . . . . . . . . 432Lesson 7-1Study Guide and Intervention . . . . . . . . 403–404Skills Practice . . . . . . . . . . . . . . . . . . . . . . . 405Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . 406Reading to Learn Mathematics . . . . . . . . . . 407Enrichment . . . . . . . . . . . . . . . . . . . . . . . . . 408Chapter 7 AssessmentChapter 7 Test, Form 1 . . . . . . . . . . . . 433–434Chapter 7 Test, Form 2A . . . . . . . . . . . 435–436Chapter 7 Test, Form 2B . . . . . . . . . . . 437–438Chapter 7 Test, Form 2C . . . . . . . . . . . 439–440Chapter 7 Test, Form 2D . . . . . . . . . . . 441–442Chapter 7 Test, Form 3 . . . . . . . . . . . . 443–444Chapter 7 Open-Ended Assessment . . . . . . 445Chapter 7 Vocabulary Test/Review . . . . . . . 446Chapter 7 Quizzes 1 & 2 . . . . . . . . . . . . . . . 447Chapter 7 Quizzes 3 & 4 . . . . . . . . . . . . . . . 448Chapter 7 Mid-Chapter Test . . . . . . . . . . . . 449Chapter 7 Cumulative Review . . . . . . . . . . . 450Chapter 7 Standardized Test Practice . . 451–452Unit 2 Test/Review (Ch. 4–7) . . . . . . . . 453–454Lesson 7-2Study Guide and Intervention . . . . . . . . 409–410Skills Practice . . . . . . . . . . . . . . . . . . . . . . . 411Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . 412Reading to Learn Mathematics . . . . . . . . . . 413Enrichment . . . . . . . . . . . . . . . . . . . . . . . . . 414Lesson 7-3Study Guide and Intervention . . . . . . . . 415–416Skills Practice . . . . . . . . . . . . . . . . . . . . . . . 417Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . 418Reading to Learn Mathematics . . . . . . . . . . 419Enrichment . . . . . . . . . . . . . . . . . . . . . . . . . 420Lesson 7-4Standardized Test PracticeStudent Recording Sheet . . . . . . . . . . . . . . A1Study Guide and Intervention . . . . . . . . 421–422Skills Practice . . . . . . . . . . . . . . . . . . . . . . . 423Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . 424Reading to Learn Mathematics . . . . . . . . . . 425Enrichment . . . . . . . . . . . . . . . . . . . . . . . . . 426 Glencoe/McGraw-HillANSWERS . . . . . . . . . . . . . . . . . . . . . . A2–A27iiiGlencoe Algebra 1

Teacher’s Guide to Using theChapter 7 Resource MastersThe Fast File Chapter Resource system allows you to conveniently file the resourcesyou use most often. The Chapter 7 Resource Masters includes the core materials neededfor Chapter 7. These materials include worksheets, extensions, and assessment options.The answers for these pages appear at the back of this booklet.All of the materials found in this booklet are included for viewing and printing in theAlgebra 1 TeacherWorks CD-ROM.Vocabulary BuilderPracticePages vii–viiiinclude a student study tool that presentsup to twenty of the key vocabulary termsfrom the chapter. Students are to recorddefinitions and/or examples for each term.You may suggest that students highlight orstar the terms with which they are notfamiliar.There is one master for eachlesson. These problems more closely followthe structure of the Practice and Applysection of the Student Edition exercises.These exercises are of average difficulty.WHEN TO USE These provide additionalpractice options or may be used ashomework for second day teaching of thelesson.WHEN TO USE Give these pages tostudents before beginning Lesson 7-1.Encourage them to add these pages to theirAlgebra Study Notebook. Remind them toadd definitions and examples as theycomplete each lesson.Reading to Learn MathematicsOne master is included for each lesson. Thefirst section of each master asks questionsabout the opening paragraph of the lessonin the Student Edition. Additionalquestions ask students to interpret thecontext of and relationships among termsin the lesson. Finally, students are asked tosummarize what they have learned usingvarious representation techniques.Study Guide and InterventionEach lesson in Algebra 1 addresses twoobjectives. There is one Study Guide andIntervention master for each objective.WHEN TO USE Use these masters asWHEN TO USE This master can be usedreteaching activities for students who needadditional reinforcement. These pages canalso be used in conjunction with the StudentEdition as an instructional tool for studentswho have been absent.as a study tool when presenting the lessonor as an informal reading assessment afterpresenting the lesson. It is also a helpfultool for ELL (English Language Learner)students.Skills PracticeThere is one master foreach lesson. These provide computationalpractice at a basic level.EnrichmentThere is one extensionmaster for each lesson. These activities mayextend the concepts in the lesson, offer anhistorical or multicultural look at theconcepts, or widen students’ perspectives onthe mathematics they are learning. Theseare not written exclusively for honorsstudents, but are accessible for use with alllevels of students.WHEN TO USE These masters can beused with students who have weakermathematics backgrounds or needadditional reinforcement.WHEN TO USE These may be used asextra credit, short-term projects, or asactivities for days when class periods areshortened. Glencoe/McGraw-HillivGlencoe Algebra 1

Assessment OptionsIntermediate AssessmentThe assessment masters in the Chapter 7Resources Masters offer a wide range ofassessment tools for intermediate and finalassessment. The following lists describe eachassessment master and its intended use. Four free-response quizzes are includedto offer assessment at appropriateintervals in the chapter. A Mid-Chapter Test provides an optionto assess the first half of the chapter. It iscomposed of both multiple-choice andfree-response questions.Chapter AssessmentCHAPTER TESTSContinuing Assessment Form 1 contains multiple-choice questionsand is intended for use with basic levelstudents. The Cumulative Review providesstudents an opportunity to reinforce andretain skills as they proceed throughtheir study of Algebra 1. It can also beused as a test. This master includesfree-response questions. Forms 2A and 2B contain multiple-choicequestions aimed at the average levelstudent. These tests are similar in formatto offer comparable testing situations. The Standardized Test Practice offerscontinuing review of algebra concepts invarious formats, which may appear onthe standardized tests that they mayencounter. This practice includes multiplechoice, grid-in, and quantitativecomparison questions. Bubble-in andgrid-in answer sections are provided onthe master. Forms 2C and 2D are composed of freeresponse questions aimed at the averagelevel student. These tests are similar informat to offer comparable testingsituations. Grids with axes are providedfor questions assessing graphing skills. Form 3 is an advanced level test withfree-response questions. Grids withoutaxes are provided for questions assessinggraphing skills.AnswersAll of the above tests include a freeresponse Bonus question. Page A1 is an answer sheet for theStandardized Test Practice questionsthat appear in the Student Edition onpages 404–405. This improves students’familiarity with the answer formats theymay encounter in test taking. The Open-Ended Assessment includesperformance assessment tasks that aresuitable for all students. A scoring rubricis included for evaluation guidelines.Sample answers are provided forassessment. The answers for the lesson-by-lessonmasters are provided as reduced pageswith answers appearing in red. A Vocabulary Test, suitable for allstudents, includes a list of the vocabularywords in the chapter and ten questionsassessing students’ knowledge of thoseterms. This can also be used in conjunction with one of the chapter tests or as areview worksheet. Glencoe/McGraw-Hill Full-size answer keys are provided forthe assessment masters in this booklet.vGlencoe Algebra 1

NAME DATE7PERIODReading to Learn MathematicsThis is an alphabetical list of the key vocabulary terms you will learn in Chapter 7.As you study the chapter, complete each term’s definition or description.Remember to add the page number where you found the term. Add these pages toyour Algebra Study Notebook to review vocabulary at the end of the chapter.Vocabulary TermFoundon PageDefinition/Description/Example consistentkuhn·SIHS·tuhntdependent nsistent(continued on the next page) Glencoe/McGraw-HillviiGlencoe Algebra 1Vocabulary BuilderVocabulary Builder

NAME DATE7PERIODReading to Learn MathematicsVocabulary BuilderVocabulary Term(continued)Foundon PageDefinition/Description/Example substitutionSUHB·stuh·TOO·shuhnsystem of equationssystem of inequalities Glencoe/McGraw-HillviiiGlencoe Algebra 1

NAME DATE7-1PERIODStudy Guide and InterventionGraphing Systems of EquationsNumber of Solutions Two or more linear equations involving the same variables forma system of equations. A solution of the system of equations is an ordered pair of numbersthat satisfies both equations. The table below summarizes information about systems oflinear equations.intersecting linessame lineyOparallel linesyOxyxOxNumber of Solutionsexactly one solutioninfinitely many solutionsno solutionTerminologyconsistent andindependentconsistent anddependentinconsistentLesson 7-1Graph of a SystemExampleUse the graph at the right to determinewhether the system has no solution, one solution, orinfinitely many solutions.a. y ! "x # 2y!x#1Since the graphs of y ! "x # 2 and y ! x # 1 intersect,there is one solution.yy!x#1y ! "x " 1y ! "x # 2Ox3x # 3y ! "3b. y ! "x # 23x # 3y ! "3Since the graphs of y ! "x # 2 and 3x # 3y ! "3 areparallel, there are no solutions.c. 3x # 3y ! "3y ! "x " 1Since the graphs of 3x # 3y ! "3 and y ! "x " 1 coincide,there are infinitely many solutions.ExercisesUse the graph at the right to determine whether eachsystem has no solution, one solution, or infinitelymany solutions.1. y ! "x " 3y!x"12. 2x # 2y ! "6y ! "x " 3y3x # y ! 32x # 2y ! 4Ox2x # 2y ! "6y!x"13. y ! "x " 32x # 2y ! 4 Glencoe/McGraw-Hill4. 2x # 2y ! "63x # y ! 3403y ! "x " 3Glencoe Algebra 1

NAME DATE7-1PERIODStudy Guide and Intervention(continued)Graphing Systems of EquationsSolve by GraphingOne method of solving a system of equations is to graph theequations on the same coordinate plane.ExampleGraph each system of equations. Then determine whether thesystem has no solution, one solution, or infinitely many solutions. If the system hasone solution, name it.a. x # y ! 2x"y!4The graphs intersect. Therefore, there is one solution. Thepoint (3, "1) seems to lie on both lines. Check this estimateby replacing x with 3 and y with "1 in each equation.x#y!23 # ("1) ! 2 x"y!43 " ("1) ! 3 # 1 or 4 The solution is (3, "1).yx#y!2Ox(3, –1)x"y!4y2y ! 4x # 2y ! 2x # 1b. y ! 2x # 12y ! 4x # 2The graphs coincide. Therefore there are infinitelymany solutions.xOExercisesGraph each system of equations. Then determine whether the system has nosolution, one solution, or infinitely many solutions. If the system has one solution,name it.1. y ! "23x " y ! "13x " y ! "1(–1, –2)122. x ! 22x # y ! 1y3. y ! xx#y!3yyx!2xOxO2x # y ! 1(2, –3)y ! "24. 2x # y ! 62x " y ! "22x # y ! 6x6. 2y ! "4x # 4y ! "2x # 2yy3x # 2y ! 6(1, 4)y ! "2x # 22x " y ! "2OO (2, 1)y ! 12 xO5. 3x # 2y ! 63x # 2y ! "4yx#y!3Glencoe/McGraw-HillxxO2y ! "4x # 4x3x # 2y ! "4404Glencoe Algebra 1

NAME DATE7-1PERIODSkills PracticeGraphing Systems of Equations1. y ! x " 1y ! "x # 1yx " y ! "42. x " y ! "4y!x#43. y ! x # 42x " 2y ! 2y!x#42x " 2y ! 2xOy ! "x # 1y!x"14. y ! 2x " 32x " 2y ! 2y ! 2x " 3Graph each system of equations. Then determine whether the system has nosolution, one solution, or infinitely many solutions. If the system has one solution,name it.5. 2x " y ! 1y ! "36. x ! 12x # y ! 4y2x " y ! 17. 3x # y ! "33x # y ! 3yyx!13x # y ! 3(1, 2)xOx2x # y ! 4Oy ! "3(–1, –3)xO3x # y ! "38. y ! x # 2x " y ! "29. x # 3y ! "3x " 3y ! "3y10. y " x ! "1x#y!3yyx " 3y ! "3x " y ! "2x#y!3y!x#2xO(2, 1)(–3, 0)xOxy " x ! "1 Ox # 3y ! "311. x " y ! 312. x # 2y ! 4x " 2y ! 3(3, 0)Oyx # 2y ! 4xy!1" –2xOGlencoe/McGraw-Hilly ! 2x # 3#2x"y!3 3y ! 6x " 6yyx " 2y ! 313. y ! 2x # 31y ! " x # 22xOx3y ! 6x " 6405Glencoe Algebra 1Lesson 7-1Use the graph at the right to determine whethereach system has no solution, one solution, orinfinitely many solutions.

NAME DATE7-1PERIODPracticeGraphing Systems of EquationsUse the graph at the right to determine whethereach system has no solution, one solution, orinfinitely many solutions.1. x # y ! 3x # y ! "3yx # 3y ! 32x " y ! "3x#y!32. 2x " y ! "34x " 2y ! "63. x # 3y ! 3x # y ! "3xO4x " 2y ! "6x # y ! "34. x # 3y ! 32x " y ! "3Graph each system of equations. Then determine whether the system has nosolution, one solution, or infinitely many solutions. If the system has one solution,name it.5. 3x " y ! "23x " y ! 06. y ! 2x " 34x ! 2y # 67. x # 2y ! 33x " y ! "5yy3x " y ! "23x " y ! "53x " y ! 0OxxOy ! 2x " 3(–1, 2)4x ! 2y # 68. Graph the system of equations y ! 0.5x # 20 andy ! 1.5x to represent the situation.9. How many treats does Nick need to sell per week tobreak even?SALES For Exercises 10–12, use the followinginformation.A used book store also started selling used CDs and videos.In the first week, the store sold 40 used CDs and videos, at 4.00 per CD and 6.00 per video. The sales for both CDsand videos totaled 180.0010. Write a system of equations torepresent the situation.403530Cost ( )BUSINESS For Exercises 8 and 9, use the followinginformation.Nick plans to start a home-based business producing andselling gourmet dog treats. He figures it will cost 20 inoperating costs per week plus 0.50 to produce each treat.He plans to sell each treat for 1.50.x # 2y ! 3Dog Treats(20, 30)y ! 0.5x # 202520151050y ! 1.5x5 10 15 20 25 30 35 40 45Sales ( )c # v ! 404c # 6v ! 180(30, 10)11. Graph the system of equations.12. How many CDs and videos did the store sell in the firstweek? Glencoe/McGraw-Hill406Glencoe Algebra 1

NAME DATE7-1PERIODReading to Learn MathematicsGraphing Systems of EquationsPre-ActivityHow can you use graphs to compare the sales of two products?Read the introduction to Lesson 7-1 at the top of page 369 in your textbook. What is meant by the term linear function?Reading the Lesson1. Each figure shows the graph of a system of two equations. Write the letter of the figuresthat illustrate each statement.A.B.yyxOOC.xD.yOyxOxa. A system of two linear equations can have an infinite number of solutions.b. A system of equations is consistent if there is at least one ordered pair that satisfiesboth equations.c. If two graphs are parallel, there are no ordered pairs that satisfy both equations.d. If a system of equations has exactly one solution, it is independent.e. If a system of equations has an infinite number of solutions, it is dependent.Helping You Remember2. Describe how you can solve a system of equations by graphing. Glencoe/McGraw-Hill407Glencoe Algebra 1Lesson 7-1 What does it mean to say that two lines intersect?

NAME DATEPERIODEnrichment7-1Graphing a TripThe distance formula, d ! rt, is used to solve many types ofproblems. If you graph an equation such as d ! 50t, the graph isa model for a car going at 50 mi/h. The time the car travels is t;the distance in miles the car covers is d. The slope of the line isthe speed.dslope is 50slope is –2550Suppose you drive to a nearby town and return. You average50 mi/h on the trip out but only 25 mi/h on the trip home. Theround trip takes 5 hours. How far away is the town?O2tThe graph at the right represents your trip. Notice that the returntrip is shown with a negative slope because you are driving in theopposite direction.Solve each problem.1. Estimate the answer to the problem in the above example. Abouthow far away is the town?2. Graph this trip and solve the problem. An airplane hasenough fuel for 3 hours of safe flying. On the trip out the pilotaverages 200 mi/h flying against a headwind. On the trip back,the pilot averages 250 mi/h. How long a trip out can thepilot make?d100O3. Graph this trip and solve theproblem. You drive to a town100 miles away. On the trip out youaverage 25 mi/h. On the trip back youaverage 50 mi/h. How many hours doyou spend driving?d5050 t4. Graph this trip and solve the problem. Youdrive at an average speed of 50 mi/h to adiscount shopping plaza, spend 2 hoursshopping, and then return at an averagespeed of 25 mi/h. The entire trip takes8 hours. How far away is the shopping plaza?dO12Glencoe/McGraw-HillOt4082tGlencoe Algebra 1

NAME DATE7-2PERIODStudy Guide and InterventionSubstitutionOne method of solving systems of equations is substitution.ExampleExampleSolve for one variable, thenUse substitution tosolve the system of equations.y ! 2x4x " y ! "4substitute.x # 3y ! 72x " 4y ! "6Substitute 2x for y in the secondequation.4x " y ! "4Second equation4x " 2x ! "4y ! 2x2x ! "4Combine like terms.Solve the first equation for x since the coefficientof x is 1.x # 3y ! 7First equationx # 3y " 3y ! 7 " 3y Subtract 3y from each side.x ! 7 " 3y Simplify."42x ! 22x ! "2Divide each side by 2.Simplify.Use y ! 2x to find the value of y.y ! 2xFirst equationy ! 2("2)x ! "2y ! "4Simplify.The solution is ("2, "4).Find the value of y by substituting 7 " 3y for xin the second equation.2x " 4y ! "6Second equation2(7 " 3y) " 4y ! "6x ! 7 " 3y14 " 6y " 4y ! "6Distributive Property14 " 10y ! "6Combine like terms.14 " 10y " 14 ! "6 " 14 Subtract 14 from each side."10y ! "20Simplify."10y"20 ! "10"10y!2Divide each side by "10.Simplify.Use y ! 2 to find the value of x.x ! 7 " 3yx ! 7 " 3(2)x!1The solution is (1, 2).ExercisesUse substitution to solve each syste

Glencoe/McGraw-Hill iv Glencoe Algebra 1 Teacher’s Guide to Using the Chapter 7 Resource Masters The Fast File Chapter Resource system allows you to conveniently file the resources you use most often. The Chapter 7 Resource Masters includes the core materials needed for Chapter 7. These materials include worksheets, extensions, and assessment options.

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