ma5d4arveeantiegi ma5d4arveeantiegi

16-12-2016
Mathematics

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Segment BDSegment BD is a perpendicular bisector of segment ACsegment AC . AD=8x−15AD=8x−15 and DC=57DC=57 .

What is the value of x?

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nobillionaireNobley nobillionaireNobley

23-12-2016

Since BD is a perpendicular bisector of AC, then ADC forms an isisceles triangle with AD = DC.
Thus 8x - 15 = 57
8x = 57 + 15 = 72
x = 72/8 = 9.

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