document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1040359>Question 1040359</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A certain compound is a mixture of two concentrations of iron which are 44% and 29%. How many pounds of each concentration must be used to form 50 lbs.of compound having 38% iron? </SPAN>\n" );
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document.write( "A certain compound is a mixture of two concentrations of iron which are 44% and 29%. How many pounds of each concentration must be used to form 50 lbs.of compound having 38% iron?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "iron + iron = iron<BR>\n" );
document.write( "0.44x + 0.29(50-x) = 0.38*50<BR>\n" );
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document.write( "44x + 29*50 - 29x = 38*50<BR>\n" );
document.write( "15x = 9*50<BR>\n" );
document.write( "x = 30 lbs (amt. of 44% needed)<BR>\n" );
document.write( "50-x = 20 lbs (amt of 29% needed)\r<BR>\n" );
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document.write( " </SPAN>\n" );
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