Alan bought a bottle of gatorade for $3. He also bought some pizza for $5 per slice. Alan did not spend more than $20 on the piz
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True. A series is arithmetic if its terms come from an arithmetic sequence.
And a sequence is said to be arithmetic any of its two consecutive terms differ by a fixed difference, common to any consecutive pair.
As you can see, in this case, all terms differ by 2, so the sequence
is arithmetic, and thus the series
is arithmetic as well.