document.write( "Question 911306: Staty Geom has a total investment at $24000 at two interest rates: 7% and 9%. If she invested thrice as much amount at 9% than 7%. How much interest will the investment gain in a year? \n" ); document.write( "
Algebra.Com's Answer #553028 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! We know that the investment for the two accounts is $24000 \n" ); document.write( "We know that the account at 9% has 3 times the amount at 7% \n" ); document.write( "x+y=24000 \n" ); document.write( "x=3y \n" ); document.write( "3y+y=24000 \n" ); document.write( "4y=24000 \n" ); document.write( "y=$6000 at 7% \n" ); document.write( "x=$18000 at 9% \n" ); document.write( "Your total for x is $18000.00 \n" ); document.write( "Your total for y is $ 6000.00 \n" ); document.write( "Total invested $18000.00 + $ 6000.00=$24000.00 \n" ); document.write( "We check \n" ); document.write( "0.09*18000.00+0.07* 6000.00=24000 \n" ); document.write( " 1620.00+ 420.00=24000 \n" ); document.write( "2040=24000 \n" ); document.write( "Since this statement is TRUE and neither x nor y is negative then all is well. \n" ); document.write( "codeintri \n" ); document.write( " \n" ); document.write( " |