document.write( "Question 593732: A retired couple has $160,000 to invest to obtain annual income. They want some of it invested in safe certificates of deposit yielding 6%. The rest they want to invest in AA bonds, yielding 11% per year. How much should they invest in each to realize exactly $15,600 per year? \n" ); document.write( "
Algebra.Com's Answer #376430 by mananth(16946)\"\" \"About 
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Certificates 6.00% per annum ---x
\n" ); document.write( "AA bond 11.00% per annum ---y
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\n" ); document.write( "x + 1 y= 160000 ------------------------1
\n" ); document.write( "
\n" ); document.write( "6.00% x + 11.00% y= 15600
\n" ); document.write( "Multiply by 100
\n" ); document.write( "6 x + 11 y= 1560000.00 --------2
\n" ); document.write( "Multiply (1) by -6
\n" ); document.write( "we get
\n" ); document.write( "-6 x -6 y= -960000.00
\n" ); document.write( "Add this to (2)
\n" ); document.write( "0 x 5 y= 600000
\n" ); document.write( "divide by 5
\n" ); document.write( " y = 120000
\n" ); document.write( "Certificates 11.00% $ 120000
\n" ); document.write( "AA bond 6.00% $ 40000
\n" ); document.write( "
\n" ); document.write( "CHECK
\n" ); document.write( "120000 --------- 11.00% ------- 13200.00
\n" ); document.write( "40000 ------------- 6.00% ------- 2400.00
\n" ); document.write( "Total -------------- 15600.00
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\n" ); document.write( "m.ananth@hotmail.ca
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