Which statement is true regarding the diagram of circle
i only have 5 minutes to answer

Recall that the angle made by two tangents from the same circle meeting at a point outside the circle is supplementary to the arc made by the points of tangency of the tangents.

thus, from the given figure, x + y = 180 degrees - - - - - - - - (1)

also, recall that the sum of the angles made by the minor arc and the major arc of the same points in a circle is 360.

thus, y + z = 360 degrees - - - - - - - - (2)

from (1), equation 2 becomes: y + z = 2(x + y) = 2x + 2y
y - 2y + z = 2x
z - y = 2x

therefore, the true statement regarding the figure is that the difference of z and y must be 2x.

The difference of  z  and  y  must be 2x. ive done the test and this is correct