Homework Help: College Pre Calculus

Posted by Anonymous on Thursday, September 1, 2011 at 4:46pm.

anne and nancy use a metal alloy that is 19.3% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 20% alloy to form 110 ounces of the desired alloy?

College Pre Calculus - bobpursley, Thursday, September 1, 2011 at 5:09pm
110*.193=X*.19+(110-x).20
solve for X.

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