Answer:
Step-by-step explanation:
You just need the distance formula here. It's very simple to follow:
[tex]d=\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }[/tex]
which, for us, looks like this:
[tex]d=\sqrt{(13-4)^2+(19-7)^2}[/tex] and
[tex]d=\sqrt{9^2+12^2}[/tex] and
[tex]d=\sqrt{81+144}[/tex] and
[tex]d=\sqrt{225}[/tex] so
d = 15
