document.write( "Question 347245: Anne and Nancy use a metal alloy that is 20% copper to make jewelry. How many ounces of a 14% alloy and a 24% alloy must be mixed to form 100 ounces of the desired alloy? \n" ); document.write( "
Algebra.Com's Answer #248305 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Anne and Nancy use a metal alloy that is 20% copper to make jewelry. How many ounces of a 14% alloy and a 24% alloy must be mixed to form 100 ounces of the desired alloy? \n" ); document.write( "----------------------- \n" ); document.write( "Equation: \n" ); document.write( "copper + copper = copper \n" ); document.write( "0.14x + 0.24(100-x) = 0.20*100 \n" ); document.write( "------ \n" ); document.write( "Multiply thru by 100 to get: \n" ); document.write( "14x + 24*100 - 24x = 20*100 \n" ); document.write( "-10x = -4*100 \n" ); document.write( "x = 40 ounces (amt of 14% alloy needed in the mixture) \n" ); document.write( "----- \n" ); document.write( "100-x = 60 ounces (amt of 24% alloy needed in the mixture) \n" ); document.write( "============================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============================ \n" ); document.write( " \n" ); document.write( " |