Answer:
B coordinates: (7, 4)
Explanation:
In order to find midpoint, you have to add both x's and divide by 2. Same for the y's. For this question, we'll have to work backwards since the midpoint is already given.
If I add 7 to 3, and divide it by 2, that will give us 5 (midpoint x-coordinate). So the x value of B is 7.
If I add 4 to 8 and divide that by 2, it will give us 6 (midpoint y-coordinate). So the y value of B is 4.
Hope this helps!