Question 87856
Use the distance formula:
d = {{{(sqrt((x1-x2)^2 + (y1-y2)^2)))}}}
.
d = {{{(sqrt((6-(-7))^2 + (0-0)^2)))}}} [plut-in the values(6,0)(-7,0) and solve]
.
d = {{{(sqrt(((13)^2 + (0)^2))))}}} 
.

d = {{{(sqrt((169) )))}}} 
.
d = 13