Let u1=[1 1 -2] u2=[5 -1 2] u3=[0 0 1] Note that u1 and u2 are orthogonal but that u3 is not orthogonal to u1 and u2 it can be shown that u3 is not the subspace W spanned by u1 and u2.Use this factor to construct the nonzero factor v in R3 that is orthogonal to u1 and u2.

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

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i would say b) is your answer

sorry if im wrong

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answer: c.  

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mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.