Answer:
Well you do what fraction says, 8 divided by 12 to get .6 repeating
Answer:

Step-by-step explanation:
Given : Vertices of Triangle
,
and 
To find : Centroid of a triangle
The centroid of a triangle is the point of intersection of the three medians of the triangle.
The formula to calculate the centroid of a triangle is:

Where,
are the coordinates of the centroid
Substituting the values in the formula gives us:



Therefore, 
B.) 8(x+4) is the best choice
The opposite of 12.1 is 12.2