Question 1162998
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The sum of the terms in an arithmetic sequence is the number of terms, multiplied by the average of the terms.<br>
In an arithmetic sequence, the average of all the terms is the average of the first and last terms.<br>
So in this problem, if x is the 27th (last) term,<br>
{{{-823.5 = 27((5+x)/2)}}}
{{{-1647 = 27(5+x)}}}
{{{x+5 = -1647/27 = -61}}}
{{{x = -66}}}<br>
ANSWER: The 27th term is -66.<br>