Important sites to go with our book:  Larson, Algebra and Trigonometry 9e
    www.LarsonPrecalculus.com    (select the correct book and look around)
    www.CalcChat.com   (select correct book and find worked out solutions to odd problems)
    www.cengagebrain.com    (register a product with code:  ELPPPPN8PPQ9XD and set up your own account)