Xy* Xz= Xyz is it always, sometimes, or never true? It is only sometimes true because y+z is different than y multiplied by z. if you plug in 1 for y and z if you add them together its 2 but if you multiply them is only 1. Now if you plug in 2 for y and z and add them it is 4, and if you multiply them it is also 4. Therefore, the equation, Xy* Xz= Xyz, is only true sometimes.
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March 2015
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