interactivestudenteditionChristianR.Hirsch•JamesT.Fey•EricW.HartHaroldL.Schoen•AnnE.WatkinswithBethE.Ritsema•RebeccaK.Walker•SabrinaKellerRobinMarcus•ArthurF.Coxford•GailBurrill2ndEdition(tltrbl)GettyImages,(br)JapackCompany/CORBISCopyright©2008bytheMcGraw-HillCompanies,Inc.Allrightsreserved.ExceptaspermittedundertheUnitedStatesCopyrightAct,nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutpriorpermissionofthepublisher.Thismaterialisbaseduponworksupported,inpart,bytheNationalScienceFoundationundergrantno.ESI0137718.OpinionsexpressedarethoseoftheauthorsandnotnecessarilythoseoftheFoundation.Sendallinquiriesto:Glencoe/McGraw-Hill8787OrionPlaceColumbus,OH43240-4027ISBN-13:978-0-07-861521-4(StudentEdition)Core-PlusMathematicsISBN-10:0-07-861521-6(StudentEdition)ContemporaryMathematicsinContextCourse1StudentEditionPrintedintheUnitedStatesofAmerica.2345678910079/043151413121110090807iiiCore-PlusMathematics2DevelopmentTeamSeniorCurriculumDevelopersChristianR.Hirsch(Director)WesternMichiganUniversityJamesT.FeyUniversityofMarylandEricW.HartMaharishiUniversityofManagementHaroldL.SchoenUniversityofIowaAnnE.WatkinsCaliforniaStateUniversity,NorthridgeContributingCurriculumDevelopersBethE.RitsemaWesternMichiganUniversityRebeccaK.WalkerGrandValleyStateUniversitySabrinaKellerMichiganStateUniversityRobinMarcusUniversityofMarylandArthurF.Coxford(deceased)UniversityofMichiganGailBurrillMichiganStateUniversity(Firsteditiononly)PrincipalEvaluatorStevenW.ZiebarthWesternMichiganUniversityAdvisoryBoardDianeBriarsPittsburghPublicSchoolsJeremyKilpatrickUniversityofGeorgiaRobertE.MegginsonUniversityofMichiganKennethRuthvenUniversityofCambridgeDavidA.SmithDukeUniversityMathematicalConsultantsDeborahHughes-HallettUniversityofArizona/HarvardUniversityStephenB.MaurerSwarthmoreCollegeWilliamMcCallumUniversityofArizonaDorisSchattschneiderMoravianCollegeRichardScheafferUniversityofFloridaEvaluationConsultantNormanL.WebbUniv...
