document.write( "Question 1053097: MATRICES: Inverse Matrix and Applications\r
\n" ); document.write( "\n" ); document.write( "Maria has $45,000 to invest and wants to receive a yearly interest of $4,290 of that money. She chose investments that pay 5%, 8%, and 12% of simple interest. She wants the inverted amount at 12%, to be double the amount inverted at 8%. How much would Maria need to invest of each percent or rate?\r
\n" ); document.write( "\n" ); document.write( "Whenever I try to apply the formula for an inversed matrix, the answer is wrong. Help? \n" ); document.write( "

Algebra.Com's Answer #668358 by ikleyn(52787) $\"\"$ $\"About$

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\n" ); document.write( "MATRICES: Inverse Matrix and Applications\r
\n" ); document.write( "\n" ); document.write( "Maria has $45,000 to invest and wants to receive a yearly interest of $4,290 of that money.
\n" ); document.write( "She chose investments that pay 5%, 8%, and 12% of simple interest. She wants the inverted amount at 12%, to be double
\n" ); document.write( "the amount inverted at 8%. How much would Maria need to invest of each percent or rate?\r
\n" ); document.write( "\n" ); document.write( "Whenever I try to apply the formula for an inversed matrix, the answer is wrong. Help?
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document.write( "1.  Inverted or INVESTED amount?  You often mix these words in the text.\r\n" );
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document.write( "2.  What is your goal? To apply inversion of matrices?\r\n" );
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document.write( "    The problem can be easily solved with more moderate and more appropriate tools \r\n" );
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document.write( "    (Substitution or Elimination methods for a system of two equations in two unknowns).\r\n" );
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