Answer
Distance can be found with formula
d = √ (x2 - x1) ^2 + (y2 - y1)^2
d = 11.18 is your distance
Step by step
You have points (10, 6) and (5, -4)
d = √ (5-10)^2 + (-4-6)^2
d = √ (-5)^2 + (-10)^2
d = √ 25 + 100
d = √ 125
d = 11.18 is your distance