document.write( "Question 1201152: Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360-lb mixture that is 15% protein? \n" ); document.write( "
Algebra.Com's Answer #835425 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "If the speed of finding the answer is important and formal algebra is not required (as in a timed math competition), here is a quick and easy way to solve any 2-part \"mixture\" problem like this. \n" ); document.write( "15% is 2/3 of the way from 9% to 18% (picture the three percentages on a number line, if it helps) \n" ); document.write( "That means 2/3 of the mixture is the higher percentage ingredient. \n" ); document.write( "ANSWER: 2/3 of 360 pounds, or 240 pounds, of the 18% protein ingredient; the other 120 pounds of the 9%. \n" ); document.write( "CHECK: \n" ); document.write( "240(.18)+120(.09) = 43.2+10.8 = 54 \n" ); document.write( "360(.15) = 54 \n" ); document.write( " \n" ); document.write( " |