Answer:
d. (8.5, -4.5)
Step-by-step explanation:
The coordinates of the midpoint can be calculated as:

Where (a, b) are the coordinates of the first point and (c, d) are the coordinates of the second point.
Then, replacing (a,b) by X(10, -5) and (c, d) by Y(7, -4), we get:

Therefore, the coordinates of the midpoint are (8.5, -4.5)