document.write( "Question 966319: sandy has a total of 35 coins in her money jar. If Sandy's jar contains only nickels and dimes and the value of all the coins is 2.50 how many nickels does Sandy have? \n" ); document.write( "

Algebra.Com's Answer #592277 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Let the number of nickels be x\r\n" );
document.write( "Then the number of dimes, using\r\n" );
document.write( "ONE PART = TOTAL MINUS OTHER PART,\r\n" );
document.write( "is 35-x.\r\n" );
document.write( "                      Value      Value\r\n" );
document.write( "Type       Number       of         of\r\n" );
document.write( " of          of        EACH       ALL\r\n" );
document.write( "coin        coins      coin      coins\r\n" );
document.write( "-------------------------------------------\r\n" );
document.write( "nickels     x        $0.05     $0.05x\r\n" );
document.write( "dimes    35-x        $0.10     $0.10(35-x)\r\n" );
document.write( "-------------------------------------------\r\n" );
document.write( "TOTALS      35        -----    $2.50\r\n" );
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document.write( " The equation comes from the column on the right\r\n" );
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document.write( "  \r\n" );
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document.write( "       0.05x + 0.10(35-x) = 2.50\r\n" );
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document.write( "Get rid of decimals by multiplying every term by 100:\r\n" );
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document.write( "            5x + 10(35-x) = 250\r\n" );
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document.write( "           5x + 350 - 10x = 250\r\n" );
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document.write( "                -5x + 350 = 250\r\n" );
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document.write( "                      -5x = -100\r\n" );
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document.write( "                        x = 20 = the number of nickels.\r\n" );
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document.write( "The number of dimes is 35-x or 35-20 or 15 dimes.\r\n" );
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document.write( "Checking:  20 nickels is $1.00 and 15 dimes is $1.50\r\n" );
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document.write( "            And indeed $1.00 + $1.50 = $2.50\r\n" );
document.write( "Edwin

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