Question 1114739
Use the Distance Formula.  Expect maybe two possible results.


{{{(4-(-2))^2+(y-6)^2=10^2}}}


{{{(4+2)^2+(y-6)^2=100}}}


{{{(y-6)^2=100-36}}}


{{{(y-6)^2=64}}}


{{{y-6=0+- 8}}}


{{{y=6+- 8}}}


{{{system(y=-2,or,y=14)}}}