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OpenStudy (coledrf):
can some one please help me with this thanks you are buying gifts for 10 people. you decide to buy each person either a CD or a DVD. A CD costs $12 and a DVD costs $20. A. let C= the number of CDs you decide to buy. What is an expression in terms of C for the number of DVDs you buy? B. what is an expression in terms of C for the cost of the CDs? for the cost of the DVDs? 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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OpenStudy (anonymous):
a) If you are buying a total of 10 gifts, and c = # of CD's, then you are buying 10 - C dvd's. Agree?
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