Answer:
(3, 1)
Step-by-step explanation:
Let the coordinates of B be (x, y)
Since, M is the midpoint of AB.
Therefore, by mid point formula:

Check out https://www.umass.edu/preferen/Game%20Theory%20Evolving/GTE%20Public/GTE%20Answers.pdf it will help!
Answer:
15
Step-by-step explanation:
2x + 3 given x=6
2(6) + 3
12 + 3
15