document.write( "Question 1167180: These are all mixed fractions I tried to write it to the best of my ability.
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document.write( "The first three term and the last term is given I need to know how many terms.
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document.write( "3 1/8, 4 1/4, 5 3/8,..., 14 3/8 \n" );
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Algebra.Com's Answer #791795 by Edwin McCravy(20065) You can put this solution on YOUR website! \r\n" ); document.write( "Instead of doing your problem for you, I'll do one just like\r\n" ); document.write( "it with mixed fractions:\r\n" ); document.write( "\r\n" ); document.write( "2 5/16, 3 11/16, 5 1/16, ... 18 13/16\r\n" ); document.write( "\r\n" ); document.write( "Change them to decimals with a calculator:\r\n" ); document.write( "\r\n" ); document.write( "2.3125, 3.6875, 5.0625,.., 18.8125\r\n" ); document.write( "\r\n" ); document.write( "common difference = d = 2nd term-1st term = 3.6875-2.3125 = 1.375 \r\n" ); document.write( "common difference = d = 3rd term-2nd term = 5.0625-3.6875 = 1.375\r\n" ); document.write( "\r\n" ); document.write( " an = a1 + (n-1)d\r\n" ); document.write( " 18.8125 = 2.3125+(n-1)1.375\r\n" ); document.write( " \r\n" ); document.write( "Subtract 3.125 from both sides\r\n" ); document.write( "\r\n" ); document.write( " 16.5 = (n-1)1.375\r\n" ); document.write( " 16.5 = 1.375(n-1)\r\n" ); document.write( " 16.5 = 1.375n - 1.375\r\n" ); document.write( "\r\n" ); document.write( "Add 1.375 to both sides:\r\n" ); document.write( " \r\n" ); document.write( " 17.875 = 1.1375n\r\n" ); document.write( "\r\n" ); document.write( "Divide both sides by 1.1375:\r\n" ); document.write( "\r\n" ); document.write( " 13 = n\r\n" ); document.write( "\r\n" ); document.write( "Answer: 13 terms\r\n" ); document.write( "\r\n" ); document.write( "Now do yours the exact same way.\r\n" ); document.write( "\r\n" ); document.write( "Edwin \n" ); document.write( " \n" ); document.write( " |