Respuesta :

When a quadrilateral is inscribed in a circle, the opposite angles are supplementary.
x + 6x + 19 = 180
7x + 19 = 180
7x = 161
x = 23

Now solve for B.
6(23) + 19 = B
138 + 19 = B
157 = B

The measure of angle B is 157 degrees

Hope this helps =)

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