document.write( "Question 1039756: The third term of an arithmetic sequence is -12 and the seventb term is 8. What is the the sum of the first 10 terms? Please show me your solution. Thanks! Godbless\r
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Algebra.Com's Answer #654503 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"a%5B3%5D=a%5B0%5D%2B%283-1%29%2Ad=-12\"
\n" ); document.write( "1.\"a%5B0%5D%2B2d=-12\"
\n" ); document.write( ".
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\n" ); document.write( "\"a%5B7%5D=a%5B0%5D%2B%287-1%29%2Ad=8\"
\n" ); document.write( "2.\"a%5B0%5D%2B6d=8\"
\n" ); document.write( "Subtract 1 from 2,
\n" ); document.write( "\"a%5B0%5D%2B6d-a%5B0%5D-2d=8-%28-12%29\"
\n" ); document.write( "\"4d=20\"
\n" ); document.write( "\"d=5\"
\n" ); document.write( "and
\n" ); document.write( "\"a%5B0%5D%2B6%285%29=8\"
\n" ); document.write( "\"a%5B0%5D=8-30\"
\n" ); document.write( "\"a%5B0%5D=-22\"
\n" ); document.write( "So then,
\n" ); document.write( "\"a%5B10%5D=-22%2B%2810-1%295\"
\n" ); document.write( "\"a%5B10%5D=-22%2B45\"
\n" ); document.write( "\"a%5B10%5D=23\"
\n" ); document.write( "So,
\n" ); document.write( "\"S%5B10%5D=%2810%2F2%29%28-22%2B23%29\"
\n" ); document.write( "\"S%5B10%5D=5\"\r
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