Applications of Linear System: 12 coins, all quarters, dimes

amberkraidich

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Suppose you have just enough money, in coins, to pay for a loaf of bread priced at $1.95. You have 12 coins, all quarters and dimes. Let q equal the number of quarters and d equal the number of dimes. Which system models the given information?
A. q + d = 12 B. 25q + 10d = 195
q + d = 1.95 q + 12 = d

C. 10q + 25d = 12 D. q + d =12
q + d = 1.95 25q + 10d = 195

Thanks!
 
Re: Applications of Linear Systems

If d equals the number of dimes you will have to decide how to represent the value of d dimes. Likewise, you will have to represent the value of q quarters. Then you can build your equation(s). If you need more help, show your work so we can see where you are stuck.
 
amberkraidich said:
Suppose you have just enough money, in coins, to pay for a loaf of bread priced at $1.95. You have 12 coins, all quarters and dimes. Let q equal the number of quarters and d equal the number of dimes. Which system models the given information?
A. q + d = 12 B. 25q + 10d = 195
q + d = 1.95 q + 12 = d

C. 10q + 25d = 12 D. q + d =12
q + d = 1.95 25q + 10d = 195

Thanks!
Duplicate post
http://www.mathhelpforum.com/math-help/ ... hoice.html
 
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