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9514 1404 393
Answer:
Step-by-step explanation:
There are a couple of relations that are applicable to these questions.
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The segment lengths relation tells us ...
10x = 8×7 . . . . . . products of segment lengths are equal
x = 56/10 = 5.6 . . . . divide by 10
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The value of y° is the average of the intercepted arcs:
y° = (85° +45°)/2 = 65°
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Additional comment
This diagram does not have enough information to allow computation of z. We would need to know the intercepted arc, or the length of the secant that meets tangent z.