You can find the distance between two ordered pairs with the distance formula.
[tex]d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}[/tex]
Plug in the values.
[tex]\sqrt{(-23 - (-18))^2 + (-63 - (-51))} \\ \\ \sqrt{-5^2 + -12^2} \\ \\ \sqrt{25 + 144} \\ \\ \sqrt{169}
[/tex]
13
So, the distance between the two points is 13 units.
