Answer:
the third one
Step-by-step explanation:
This is a question that is not awnsable so your teachers need to get smarter
Answer:
1,398.983
Step-by-step explanation:
Answer:

Step-by-step explanation:
Let the co-ordinates of B be 
If a point
is a mid-point of line segment AB with
and
, then:

Here,
is
is
.
So, 
Plug in the formula and solve for unknowns.

Therefore, the co-ordinates of point B are 