Sunday

September 21, 2014

September 21, 2014

Posted by **missy** on Sunday, June 26, 2011 at 10:21pm.

My set up is:

10 (.13 + .87) = 10 (.13 + X + .69)

I'm not sure if that's correct.

- Math Concentration -
**Henry**, Tuesday, June 28, 2011 at 5:18pmSilver = 0.13 * 10 = 1.3 grams.

Gold = 10 1.3 = 8.7 grams.

New Alloy: Gold=69% of total solution.

G / (G+S) = 0.69,

8.7 / (8.7 + S) = 0.69,

Cross multiply:

6 + 0.69S = 8.7,

0.69S = 8.7 - 6 = 2.7,

S = 3.91 Grams of silver, total.

3.91 - 1.3 = 2.6 grams of silver added.

**Answer this Question**

**Related Questions**

Physics(class) /Math (problem) - Joe has a ring weighing 16 grams made of an ...

algebra - Joe has a ring weighing 15 grams made of an alloy of 20 silver and the...

Calculus - A wizard with a long beard and bright, flaming eyes places a table in...

Chemistry - A piece of metal alloy (a solution of metals) is made of gold and ...

algebra - assume that a jeweler needs 80 grams of an alloy that is 30% gold. He ...

Algebra - A goldsmith has two gold alloys. The first alloy is 20% gold; the ...

College Algebra - Chemistry - A goldsmith has two gold alloys. The first alloy ...

algebra - a jeweler purchased 5 oz of a gold alloy and 20 oz of a silver alloy ...

Chemistry - A mettallurgist decided to make a special alloy. He melted 30 grams ...

chemistry - Archimedes used density along with mass and volume of alloys (...