Answer:
The solved problem is in the photo. Hope it helps.
Answer:
850
Step-by-step explanation:
400+550+850=1800. 1800/3= 600
We can see the sequence goes by decreasing 9 on each number
so the numbers are
2, -7, -16, -25, -34, -43, -52, -61, -70
so adding all these numbers we get
2-7-16-25-34-43-52-61-70
= -306
hope this helped
X^2 + X - 12 = 0
(X + 4)(X - 3) = 0
X = -4 and X = 3.