Answer:
13
Step-by-step explanation:
For finding the distance between two points, we can just use the distance formula.
![d=\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2} }](https://tex.z-dn.net/?f=d%3D%5Csqrt%7B%28x_%7B2%7D-x_%7B1%7D%29%5E%7B2%7D%2B%28y_%7B2%7D-y_%7B1%7D%29%5E%7B2%7D%20%20%20%20%20%7D)
-6 is x1, 7 is y1. -1 is x2, -5 is y2.
![\sqrt{(-1-(-6))^2+(-5-7)^{2} }](https://tex.z-dn.net/?f=%5Csqrt%7B%28-1-%28-6%29%29%5E2%2B%28-5-7%29%5E%7B2%7D%20%7D)
Simplify inside the parenthesis.
![\sqrt{(5)^2+(-12)^2}](https://tex.z-dn.net/?f=%5Csqrt%7B%285%29%5E2%2B%28-12%29%5E2%7D)
Simplify the exponents.
![\sqrt{25+144}](https://tex.z-dn.net/?f=%5Csqrt%7B25%2B144%7D)
![\sqrt{169}](https://tex.z-dn.net/?f=%5Csqrt%7B169%7D)
The square root of 169 is 13.
49.5 is the answer because 66% equals 2/3.