Step-by-step explanation:
Known points
Endpoint: (-6,-3) and midpoint (-5,-5)
Hint: Use the midpoint formula,substitute the known values and solve separately.
[tex]midpoint = ( \frac{x1 + x2}{2} . \frac{y1 + y2}{2} )[/tex]
*replace the dot with a comma as in (x,y)