In a tangent segment, no part of it is in the interior of the circle. with a secant, there is a part in the interior called the chord. hope it helps
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5x - 5 = x + 11
5x = x + 16
4x = 16
x = 4
The first one is 5
Second 3
Third -7
Fourth is 9
And fifth is 10
A planets gravity pulls equally from all sides, this is why all planets are almost perfectly spherical in shape.