document.write( "Question 477757: rose invested part of her money at 8% per year and twice of that amount at 5% per year. if the returns last year from the two investments were 7200 how much did rose invest at each rate? \n" ); document.write( "
Algebra.Com's Answer #327386 by mananth(16946)![]() ![]() You can put this solution on YOUR website! -------------- 8.00% per annum ------------- x \n" ); document.write( "------------- 5.00% per annum ------------y y=2x \n" ); document.write( " total investment 50000 \n" ); document.write( " Interest----- $7,200.00 \n" ); document.write( " \n" ); document.write( "8.00% x + 5.00% * 2 x = $7,200.00 \n" ); document.write( "0.08 x + 0.05 * 2 x = $7,200.00 \n" ); document.write( "0.08 x + 0.1 x = $7,200.00 \n" ); document.write( "0.18 x = $7,200.00 \n" ); document.write( "/ 0.18 \n" ); document.write( "x= $40,000.00 @ 7% \n" ); document.write( "2x = $80,000.00 @5% \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " CHECK \n" ); document.write( " $3,200.00 + $4,000.00 = $7,200.00 \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |