document.write( "Question 662023: You have already invested $550 in a stock with an annual return of 11%. How much of an additional $900 should be invested at 12% and how much at 6% so that the total return on the entire $1,450 is 9%? (Round each answer to the nearest cent.) \n" ); document.write( "
Algebra.Com's Answer #411892 by ReadingBoosters(3246)![]() ![]() ![]() You can put this solution on YOUR website! 550(.11) = 60.50 return from 11% \n" ); document.write( "1450(.09) = 130.5 total ROI \n" ); document.write( "130.50 - 60.50 = 70 return needed \n" ); document.write( ".12x + .06x = 70 \n" ); document.write( "x = $ at 12% \n" ); document.write( "y = % at 6% \n" ); document.write( "x+y = 900; so x = 900 - y \n" ); document.write( ".12x + .06y = 70 \n" ); document.write( ".12(900-y) + .06y = 70 \n" ); document.write( "108 - .12y + .06y = 70 \n" ); document.write( "108 - .06y = 70 \n" ); document.write( "108 - 70 = .06y \n" ); document.write( "38 = .06y \n" ); document.write( "y = 633.33 \n" ); document.write( "x = 900 - 633.33 = 266.67\r \n" ); document.write( "\n" ); document.write( "266.67 at 12% \n" ); document.write( "633.33 at 6% \n" ); document.write( " \n" ); document.write( " |