Question

what is the distance between (-5,-5) and (-9,-2)

Answer 1

$d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\\\\ d=\sqrt{(-5-(-9))^2+(-5-(-2))^2}\\\\ d=\sqrt{16+9}\\\\ d=\sqrt{25}\\\\ d=5$