Question 141068
Distance formula:

{{{d=sqrt((x2-x1)^2+(y2-y1)^2)}}}

For your two points:

{{{d=sqrt((-6-(-4))^2+(-8-5)^2)}}}
{{{d=sqrt((-2)^2+(-13)^2)}}}
{{{d=sqrt(4+169)}}}
{{{d=sqrt(173)}}}