Tina would like to melt down her existing gold jewelry to make a 20 ounce gold necklace that is 90% pure gold. After melting her jewelry, she is left with two batches. One batch is 75% pure. The other batch is 96% pure. How much of the 96% pure melted gold should Tina mix with the 75% pure melted gold to obtain 20 ounces of 90% pure gold?

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anonymous · Answer

The answer is 3 batches and therefore you will get the 90%.

anonymous · Answer

Best answer please. I will help more if you need it.

anonymous · Answer

Please close this question if you are done here. not to be negative, i just wanna help the people who actually NEED help, not people who forgot to close their questions on accident.
Tag me if you need help!