Respuesta :

reinhard10158

Step-by-step explanation:

is "12x + 2" supposed to be the arc angle of UW ?

I assume so.

then per tangent secant angle theorem

6x + 4 = (154 - (12x + 2))/2 = (154 - 12x - 2)/2 = 77 - 6x - 1

12x + 4 = 77 - 1

12x = 72

x = 6

so, D is correct.