Use Cramer's rule to solve the system. 2x + 4y - z = 32 x - 2y + 2z = -5 5x + y + z = 20

Question

explainitlikeimfive · Answer

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wolf1728 · Answer

Is there more to that problem than what is posted?

explainitlikeimfive · Answer

That's all of it.

wolf1728 · Answer

The reason I ask is because solving for 3 unknowns using Cramer's method requires evaluating 4 third order determinants and the multiple choice answer is much too simple for that.

explainitlikeimfive · Answer

It's all they've given me. Whether none of the choices are correct or not, I gotta pick one.

wolf1728 · Answer

I'm just trying to find anything that looks even partially like a solution.  LOL

explainitlikeimfive · Answer

Any kind of help is greatly appreciated.

wolf1728 · Answer

The answer is D they just want you to find the roots of the 3 equations
x = 1, y = 9, z = 6

(Sheesh why don't they just say it)

explainitlikeimfive · Answer

I dunno, whoever designed these questions are fantastic at making a simple task seem impossible.

wolf1728 · Answer

Yes, that is ridiculous.
Well, now you have your answer :-)