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Mathematics 13 Online
OpenStudy (anonymous):

Michael is shopping for a new CD player with a built-in alarm clock. Electronics City has a special coupon for $30 off any CD player and is also having a sale with a 25% discount on any alarm clock. Use composition of functions to model how much Michael would pay for a CD alarm clock if the clerk applies the coupon c(x) first and then the discount d(x)

OpenStudy (anonymous):

c(x) =x-30 d(x) =x-.25x or .75x

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