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?
What I came up with:
A. 20c
B. ???
C. ???
Let me know if I got something wrong.
Thanks so much,
AnnaRose. [x
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?
What I came up with:
A. 20c
B. ???
C. ???
Let me know if I got something wrong.
Thanks so much,
AnnaRose. [x
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