Question

9 miles 10 miles 19 miles 22 miles ??

Answer 1

Joan is 5 miles away from Gary.
Gary is 8 miles away from Kash.

Let the distance between Joan and Kash be $x$. Then you can use Pythagorean theorem to find it:
$x=\sqrt{5^2+8^2}=\sqrt{25+64}=\sqrt{89}\approx 9.434$