Answer :

irspow
The distance between any two points can be expressed as:

d^2=(x2-x1)^2+(y2-y1)^2, where (x1,y1) and (x2,y2) are any two points.

In this case we have: (-4,7) and (8,7) so

d^2=(8--4)^2+(7-7)^2

d^2=12^2+0^2

d^2=144

d=√144

d=12 units

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