Question 907689

YZ = 18 ... given


XY/YZ=7/9 ... given


XY/18=7/9 ... plug in YZ = 18


XY=18*(7/9) ... Multiply both sides by 18.


XY = 14 ... multiply and simplify


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WX/XY=5/7 ... given


WX/14=5/7 ... plug in XY = 14


WX=14*(5/7) ... Multiply both sides by X.


WX = 10 ... Multiply


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Summary so far:


YZ = 18
XY = 14
WX = 10

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Use those values above to find WZ


WZ = WX + XY + YZ ... segment addition postulate


WZ = 10 + 14 + 18 ... substitution


WZ = 42 ... substitution


So the final answer is <font color="red">e.42</font>