Answer:
Yes. It is an arithmetic sequence.
Step-by-step explanation:
The sequence would be add 5 every time.
-9 + 5 = -4
-4 + 5 = 1
1 + 5 = 6
yes , because run over rise wont give you a valid answer
(k-x)(x+y)
x×(k-x)+y×(k-x)
=(k-x)(x+y)
