PLEEEEEEASE HELP MEE WITH THIS WORDED PROBLEM!
Solve. Show all your work and explain your steps.
You are buying gifts for 10 people. You decide either to buy 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?

Question

PLEEEEEEASE HELP MEE WITH THIS WORDED PROBLEM!
Solve. Show all your work and explain your steps.
You are buying gifts for 10 people. You decide either to buy 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?

anonymous · Answer

A) and B) The cost of CD's is 12c. And the cost of dvd's is 20(10-c). 
C) 12c + 20(10 - c)
 12c + 200 - 20c
  -8c + 200