document.write( "Question 668879: a metallurgist has one alloy containing 20% copper and another containing 70% copper. These can be blended to get a mixture between 20 and 70%. \r
\n" ); document.write( "\n" ); document.write( "a metallurgist has one alloy containing 20% copper and another containing 70% copper. These can be blended to get a mixture between 20 and 70%. use your model to calculate the mixture needed for 50lbs of 40% copper. \n" ); document.write( "

Algebra.Com's Answer #415907 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "a metallurgist has one alloy containing 20% copper and another containing 70% copper. These can be blended to get a mixture between 20 and 70%. 
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document.write( "Create a model to determine how many pounds of each alloy to mix to achieve 
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document.write( "a given weight and copper percentage: 
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document.write( "calculate the mixture needed for 50lbs of 40% copper.
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document.write( "                   .50x = .20*50
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document.write( "                      x = 20lbs 70%  and 30lbs 20% \n" );
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