Use the zeroes to figure this out... x=-18, y=9
Answer:
-2497
Step-by-step explanation:
Sn=n/2[2a+(n-1)d]
=22/2[2*-40+(22-1)d]
=11(2*-40+(21*-7)
= -2497
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The answer is three million , three hundred , eighty eight thousand , one hundred , ninth eight
