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irinina [24]
2 years ago
11

Secant DB intersects secant DZ at point D. Find the length of DY

Mathematics
1 answer:
netineya [11]2 years ago
5 0
By the Intersecting Secants Theorem we have
2x(2x+7)=x(x+23)
4x^2+14x=x^2+23x
3x^2=9x
3x=9
x=3
Since DY is length 2x,
the length of DY is 6.
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