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AB amd AC are secant lines. angle 40, mDE = 2x - 10 and mBC = 3x+40

AB amd AC are secant lines. angle 40, mDE = 2x - 10 and mBC = 3x+40-example-1
User Zhimin
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Answer:

Explanation:

AB amd AC are secant lines. angle 40, mDE = 2x - 10 and mBC = 3x+40-example-1
User Dani Van Der Meer
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