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Goryan [66]
3 years ago
12

NEED HELP PLEASE don't know how to solve

Mathematics
1 answer:
amid [387]3 years ago
3 0
The angle formed by the intersection of tangent and secant outside the circle equals half the difference of the <span>intercepted arcs.

</span>\frac{10x+20-80}{2}=2x+15 \\ 10x-60=2(2x+15) \\ 10x-60= 4x+30 \\ 10x-4x=30+60 \\ 6x=90 \\ x=90/6 \\ x=15<span>
</span>
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Answer:

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Step-by-step explanation:

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The correct answer is C. -1

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