Given the line segment AR
The coordinate of A is 0.
AR=10
First, we determine the coordinate of R.

Therefore, the coordinate of R is 10(to the right of A
) or -10(to the left of A).
The midpoint of a number line is calculated using the formula below:

Therefore, the only possible coordinate for the midpoint of the segment AR is:

Therefore:
• If R is to the left of A, the midpoint of AR = -5
,
• If R is to the right of A, the midpoint of AR = 5
The possible coordinates for the midpoint of the segment AR are 5 and -5.