document.write( "Question 325167: Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in to get 280-lb mixture that is 9% protein?\r
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document.write( "How many pounds of the cornmeal should be in the mixture?\r
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document.write( "How many pounds of the soybean meal should be in the mixture?\r
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Algebra.Com's Answer #232849 by stanbon(75887) ![]() You can put this solution on YOUR website! Soybean meal is 14% protein; cornmeal is 7% protein. \n" ); document.write( "How many pounds of each should be mixed together to \n" ); document.write( "get 280-lb mixture that is 9% protein? \n" ); document.write( "------------ \n" ); document.write( "Quantity Eq: S + C = 280 lb \n" ); document.write( "Protein Eq: 0.14S+0.07C = 0.09*280 \n" ); document.write( "---------------------- \n" ); document.write( "Multiply thru 1st by 14 \n" ); document.write( "Multiply thru 2nd by 100 \n" ); document.write( "----------------------- \n" ); document.write( "14S + 14C = 14*280 \n" ); document.write( "14S + 7C = 9*280 \n" ); document.write( "--- \n" ); document.write( "Subtract and solve for \"C\": \n" ); document.write( "7C = 5*280 \n" ); document.write( "C = 200 lb (amt. of cornmeal needed in the mix) \n" ); document.write( "--- \n" ); document.write( "Since S+C = 280, S = 80 lb (amt. of soybean needed in the mix) \n" ); document.write( "============================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "==============\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "How many pounds of the cornmeal should be in the mixture? \n" ); document.write( "__ pounds \r \n" ); document.write( "\n" ); document.write( "How many pounds of the soybean meal should be in the mixture? \n" ); document.write( "__ pounds \n" ); document.write( " \n" ); document.write( " |