Answer:the length is 10
Explanation:
since m is the midpoint it is 3 away from y on the x axis and 4 away on the y axis
so if you go the same distance away from the midpoint you get -2, 11
so -2 is 6 away from 4 away and 3 is 8 away from 11
6^2 = 36
8^2 = 64
36+64= 100
the square root of 100 is 10