document.write( "Question 840618: Determine the 30th term of the sequence -10, -15, -20... \n" ); document.write( "
Algebra.Com's Answer #508109 by TheInstructor(29)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "-10, -15, -20
\n" ); document.write( "Notice the common difference? This is an A.P with a common difference of -5.\r
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\n" ); document.write( "\n" ); document.write( "d = -5
\n" ); document.write( "a = -10\r
\n" ); document.write( "\n" ); document.write( "Tn= a+(n-1)d
\n" ); document.write( "T30= -10 + (30-1) x -5
\n" ); document.write( "Therefore T30 = -155\r
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\n" ); document.write( "\n" ); document.write( "Hope that helped.
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