The answer is (3,-4). On a graph you see it is right in the middle. Hope this helps.
Answer:
x=2
Step-by-step explanation:

Add 14 to both sides

Square root it
x=2
Answer:
1
Step-by-step explanation:
The centroid is the average of the coordinates of the three vertices. If you know two vertices (A and B) and the centroid (Q), then the third vertex (C) is ...
C = 3Q -A -B
It has only one possible location.
The answer would be b and c