The given points are (8,2) and (-1,0).
We just need to use the following formula and the given points
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]Replacing the given points, we have
[tex]\begin{gathered} d=\sqrt{(-1-8)^2+(0-2)^2} \\ d=\sqrt{(-9)^2+(-2)^2} \\ d=\sqrt{81+4}=\sqrt{85}\approx9.2 \end{gathered}[/tex]