To find the x-coordinate of the midpoint of segment AB, we can use the midpoint formula. The midpoint formula states that the x-coordinate of the midpoint is the average of the x-coordinates of the endpoints.
In this case, the coordinates of point A are (-3, 3) and the coordinates of point B are (5, 7).
To find the x-coordinate of the midpoint, we can use the formula:
x-coordinate of midpoint = (x-coordinate of A + x-coordinate of B) / 2
Substituting the given coordinates, we have:
x-coordinate of midpoint = (-3 + 5) / 2
Simplifying the expression, we get:
x-coordinate of midpoint = 2 / 2
x-coordinate of midpoint = 1
Therefore, the x-coordinate of the midpoint M is 1.