document.write( "Question 526678: by wieght, one fertilizer is 20% pottassium, 30% nitrogen, and 50% phosphorus. a second fertilizer has percents of 10, 30, and 60, respectively, and a third fertilizer has percents of 0, 20, 80, respectively.
\n" ); document.write( "How much of each must be mixed to get 200lb of fertilizer with percents of 12, 28.5, 59.5, respectively? \n" ); document.write( "
Algebra.Com's Answer #348642 by stanbon(75887)\"\" \"About 
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by weight,
\n" ); document.write( "A fertilizer is 20% potassium, 30% nitrogen, and 50% phosphorus.
\n" ); document.write( "B fertilizer has percents of 10, 30, and 60,
\n" ); document.write( "C fertilizer has percents of 0, 20, 80, respectively.
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\n" ); document.write( "How much of each must be mixed to get 200lb of fertilizer with percents of 12, 28.5, 59.5, respectively?
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\n" ); document.write( "Equations:
\n" ); document.write( "Potassium Eq: 0.20a + 0.10b + 0*c = 0.12*200
\n" ); document.write( "Nitrogen Eq:: 0.30a + 0.30b + 0.20c = 0.285*200
\n" ); document.write( "Phosphorus Eq:0.50a + 0.60b + 0.80c = 0.595*200
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\n" ); document.write( "I used a matrix method to get:
\n" ); document.write( "A = 70 lbs.
\n" ); document.write( "B = 100 lbs
\n" ); document.write( "C = 30 lbs.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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