Answer:
12
Step-by-step explanation:
There is a very simple to explain way to solve this involving the formula for slope-
First, find slope (y1-y2)/(x1-x2)
(1-3)/(-5-(-2)
2/3
Second, find the change in x and multiply it by the slope.
-2-(-5)= 3 unit change in x
3*(2/3)= 6
Now we have the length of our first segment-- we must multiply by two (hence midpoint) to get our final answer for the whole segment length
6*2=12
