The 10th term of an arithmetic sequence is 10 and the sum of the first 10 terms is -35. Find the first term a1, and the common d
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we know that
Two angles are supplementary if their sum is equal to degrees
in this problem we have
so
therefore
<u>the answer is</u>
The two angles are supplementary
bearing in mind that the average rate of change = slope, and for that we can simply use two points off the table.