use the distance forumla
d=\(\sqrt{(x1-x2)^2+(y1-y2)^2}\)
subsitute
x1=-4
x2=10
y1=6
y2=-5
d=\(\sqrt{(-4-10)^2+(6-(-5))^2}\)
d=\(\sqrt{(-14)^2+(6+5))^2}\)
d=\(\sqrt{(-14)^2+(11))^2}\)
d=\(\sqrt{196+121}\)
d=\(\sqrt{317}\)
d=aprox 17.8045
if on a test, put √317