Answer:
c
Step-by-step explanation:
It has a constant value.
Solution: We are given:
Predicted Sales by Sameera 
Actual Sales by Sameera 
Now to find the Percent error, we have to use the below formula:



Therefore, the percent error is
Answer:
second one
Step-by-step explanation:
(n-1)+n+(n+1)
With n as the middle of 3 integers, n-1 is the integer just before n and n+1 is the integer just after n.
Answer:
d
Step-by-step explanation:
2x+3x-9-1
x
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