The answer to the question
Answer:
It is not an arithmetic sequence.
Step-by-step explanation:
In an arithmetic sequence, the differences between any two consecutive terms are equal.
7 - 6 = 1
9 - 7 = 2
The differences between two different sets of consecutive terms are different, so it is not an arithmetic sequence.
Answer:
12.3-7.9x
Step-by-step explanation:
8.9+3.4=12.3
-1.4x+(-6.5x)=-7.9x