document.write( "Question 1089741: Mr.Caminiti has some money invested at 4% and three times as much invested at 6%.Her total annual income from the two investments is $ 1100.how muxh is invested at each rate? \n" ); document.write( "
Algebra.Com's Answer #704108 by josmiceli(19441)\"\" \"About 
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(1) \"+I%5B1%5D+=+P%5B1%5D%2Ar%5B1%5D%2At+\"
\n" ); document.write( "(2) \"+I%5B2%5D+=+P%5B2%5D%2Ar%5B2%5D%2At+\"
\n" ); document.write( "----------------------
\n" ); document.write( "\"+I%5B2%5D+=+1100+-+I%5B1%5D+\"
\n" ); document.write( "\"+r%5B1%5D+=+.04+\"
\n" ); document.write( "\"+r%5B2%5D+=+.06+\"
\n" ); document.write( "\"+P%5B2%5D+=+3P%5B1%5D+\"
\n" ); document.write( "----------------------
\n" ); document.write( "(1) \"+I%5B1%5D+=+P%5B1%5D%2A.04%2A1+\"
\n" ); document.write( "(2) \"+1100+-+I%5B1%5D+=+3%2AP%5B1%5D%2A.06%2A1+\"
\n" ); document.write( "--------------------------------
\n" ); document.write( "(1) \"+I%5B1%5D+=+.04P%5B1%5D+\"
\n" ); document.write( "(2) \"+1100+-+I%5B1%5D+=+.18P%5B1%5D+\"
\n" ); document.write( "Plug (1) into (2)
\n" ); document.write( "(2) \"+1100+-+.04P%5B1%5D+=+.18P%5B1%5D+\"
\n" ); document.write( "(2) \"+.22P%5B1%5D+=+1100+\"
\n" ); document.write( "(2) \"+P%5B1%5D+=+5000+\"
\n" ); document.write( "and
\n" ); document.write( "\"+P%5B2%5D+=+3P%5B1%5D+\"
\n" ); document.write( "\"+P%5B2%5D+=+15000+\"
\n" ); document.write( "$5,000 invested @ 4%
\n" ); document.write( "$15,000 invested @ 6%
\n" ); document.write( "--------------------------
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+I%5B1%5D+=+.04P%5B1%5D+\"
\n" ); document.write( "(1) \"+I%5B1%5D+=+.04%2A5000+\"
\n" ); document.write( "(1) \"+I%5B1%5D+=+200+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+1100+-+I%5B1%5D+=+.18P%5B1%5D+\"
\n" ); document.write( "(2) \"+1100+-+I%5B1%5D+=+.18%2A5000+\"
\n" ); document.write( "(2) \"+1100+-+I%5B1%5D+=+900+\"
\n" ); document.write( "\"+P%5B1%5D+%2B+P%5B2%5D+=+200+%2B+900+\"
\n" ); document.write( "\"+P%5B1%5D+%2B+P%5B2%5D+=+1100+\"
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( "
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