document.write( "Question 1146198: The first term of an arithmetic sequence is 5. The ratio of the sum of the first four terms to the sum of the first ten terms is 8:35. Find the common difference. \n" ); document.write( "
Algebra.Com's Answer #767485 by Edwin McCravy(20077)\"\" \"About 
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<--sum of first n terms.\r
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The ratio of the sum of the first four terms to the sum of the first ten terms is 8:35.
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document.write( "Sum of first four terms: \r\n" );
document.write( "                         \"matrix%281%2C3%2CS%5B4%5D%2C%22%22=%22%22%2C+2%2A%2810%2B3d%5E%22%22%29%29\"\r\n" );
document.write( "                         \"matrix%281%2C3%2CS%5B4%5D%2C%22%22=%22%22%2C+20%2B6d%29%29\"\r\n" );
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document.write( "Sum of first ten terms: \r\n" );
document.write( "                         \"matrix%281%2C3%2CS%5B10%5D%2C%22%22=%22%22%2C+5%2A%2810%2B9d%5E%22%22%29%29\"\r\n" );
document.write( "                         \"matrix%281%2C3%2CS%5B10%5D%2C%22%22=%22%22%2C+50%2B45d%29%29\"\r\n" );
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document.write( "Their ratio \r\n" );
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document.write( "\"matrix%281%2C3%2C%2850%2B45d%29%2F%2820%2B6d%29%2C%22%22=%22%22%2C8%2F35%29%29\"\r\n" );
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document.write( "You solve that for d. Begin by cross-multiplying.\r\n" );
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document.write( "Edwin
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