AB and BC share point B to form AC. If AC=7 and BC=5, then what is the length of AB?

asked May 26, 2015 132k views

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3 votes

A B C
The whole segment is AC,AC=7,BC=5.
AB=?
AC-BC=AB
7-5=2

David Miani answered May 28, 2015

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2 votes

$|AC|=7;\ |BC|=5\\\\|AC|=|AB|+|BC|\\\\|AB|+5=7\ \ \ \ \ |subtract\ 5\ from\ both\ sides\\\\\boxed$

Micadelli answered May 30, 2015

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