Answer:
5
Step-by-step explanation:
You can use the Pythagorean theorem to find the distance from (1,2) to (-3,5)
a^2 + b^2 = c^2
So (1,2) -> (-3,5) is 4 to the left and 3 up
4^2=16
3^2=9
16 + 9 = 25
The square root of 25 is 5