Answer:
2+2 is 4 minus 1 is 3.
Step-by-step explanation:
Think about the question, you can't say that i am wrong.
well your asking a question that needs a graph
7.071 cm
-2497
Sn=n/2[2a+(n-1)d]
=22/2[2*-40+(22-1)d]
=11(2*-40+(21*-7)
= -2497
