1 mils East + 5 miles North, and + 10 miles West.
It would be the same if I say the position of X = -9 and Y = 5
From Pythagorean theorem: a² + b² = c²
And in this case, c is the distance we want to calculate, a=X and b=Y
(-9)² + 5² = c²
81 + 25 = c²
106 = c²
c = √106 ≅ 10,3 miles
