document.write( "Question 386369: Two terms of an arithmetic sequence are a9 = 85 and a30 = 295. Find a rule for the nth term. \n" ); document.write( "
Algebra.Com's Answer #273151 by scott8148(6628)\"\" \"About 
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the 21 differences between a9 and a30 equals 210 (295-85)
\n" ); document.write( "so the difference between consecutive terms is 10 (210/21)\r
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\n" ); document.write( "\n" ); document.write( "an = nd + a0 ___ a9 = 9(10) + a0 ___ 85 = 90 + a0 ___ -5 = a0\r
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\n" ); document.write( "\n" ); document.write( "an = n(10) - 5
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