document.write( "Question 831929: \"Harold made two investments totaling $11,100. Over the year the two investments earned $1,142 in simple interest. Part of the $11,100 earned 8% while the other part earned 12%. How much was invested at each rate?\"\r
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document.write( "Thank you in advance :)
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Algebra.Com's Answer #501743 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! \"Harold made two investments totaling $11,100. Over the year the two investments earned $1,142 in simple interest. Part of the $11,100 earned 8% while the other part earned 12%. How much was invested at each rate?\" \n" ); document.write( "Thank you in advance :) \n" ); document.write( "------ \n" ); document.write( "Quantity Eq:: x + y = 11,100 \n" ); document.write( "Interest Eq: 8x +12y = 114200 \n" ); document.write( "-------------------------------------- \n" ); document.write( "Modify for elimination: \n" ); document.write( "8x + 8y = 88,800 \n" ); document.write( "8x +12y = 114200 \n" ); document.write( "---------------------- \n" ); document.write( "Subtract and solve for \"y\": \n" ); document.write( "4y = 25,400 \n" ); document.write( "y = $6350.00 (amt. invested at 12% \n" ); document.write( "--- \n" ); document.write( "x = 11,100-6350 = $4750.00 \n" ); document.write( "------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=================== \n" ); document.write( " |