document.write( "Question 907039: a metal alloy weighing 3 mg and containing 70% copper is melted and mixed with 1 mg of a different alloy which contains 30% copper. what percent of the resulting alloy is gold? \n" ); document.write( "
Algebra.Com's Answer #550160 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
.7*3+.3*1=2.4 mg of copper
\n" ); document.write( "2.4/4=60% copper
\n" ); document.write( "Where is the gold?
\n" ); document.write( "40% something else
\n" ); document.write( "
\n" );