Answer:

Step-by-step explanation:
Simplify:


Group same factor:

Add :

Apply the distributive law: -(a+b) = -a - b


Group same factor:

Subtract:

Add:

Group same factor:

Hence answer = 
<u><em>~lenvy~</em></u>
Answer:
0
Step-by-step explanation:
To find the slope of a line, we uses y2-y1/x2-x1:
y2-y1/x2-x1
1-1/7+2
0/9
0
The slope of the line is 0.
<em>If u have any questions about what I did feel free to ask in the comments!</em>
Answer:
Option B.
Step-by-step explanation:
Given information:
Σ(x − M) = 44
where, M is mean.
Sample size = 12
The computational formula for sample variance is

where, M is sample mean and N is sample size.
Substitute Σ(x − M) = 44 and N=12 in the above formula.



The sample variance is 4.0.
Therefore, the correct option is B.
Answer:
-7,-4,-3,+1,+8
Step-by-step explanation:
The bigger the negative number, the less it's worth