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Mathematics 3 Online
OpenStudy (anonymous):

hey can u please help if u can?!?!?! You are buying gifts for 10 ppl.You decide to buy each person either a CD or a DVD. A CD costs $12 and a DVD cost $20. a. Let c=the number of CD's you decide to buy.What is an expression in terms of c for the number of DVD's you buy? b. What is an expression in terms of c for the cost of the CD's? For the cost of the DVD's? c.Write and simplify an expression in terms of c for the total cost of all the gifts you buy.What properties of real numbers did you use to simplify the expression?

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