Posted by **Aleah** on Wednesday, July 15, 2009 at 6:41pm.

A U.S. nickel contains 3 ounces of copper for every ounce of nickel. How much nickel is required for 14 pounds of copper?

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**Ms. Sue**, Wednesday, July 15, 2009 at 6:49pm
Your turn. See my last post.

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**Aleah**, Wednesday, July 15, 2009 at 7:11pm
x/3=14/1

1x/1=42/1

x=42

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**Ms. Sue**, Wednesday, July 15, 2009 at 7:21pm
Oops -- your answer doesn't make sense. There's much LESS nickel than copper in the coin.

Please try again.

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**Aleah**, Wednesday, July 15, 2009 at 7:45pm
I really don't understand how to work this problem.

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**Ms. Sue**, Wednesday, July 15, 2009 at 7:52pm
You had the right idea -- but you didn't set up the correct proportion.

3 is to 1 as 14 is to x.

3/1 = 14/x

Now -- cross multiply.

What do you get?

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**Aleah**, Wednesday, July 15, 2009 at 7:57pm
I got 4.6.

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**Ms. Sue**, Wednesday, July 15, 2009 at 9:03pm
Yes -- except you should round 4.66666 to 4.7 pounds.

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