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im taking geometry and discrete mathematics at my school. Its a 12 U course. And im not doing as well as i would like in it. Im at about a 75, annd i want that to be around 85. So im looking to you guys for some help. If you guys wouldn't mind awnsering a few questions i have from my homework each night it would be greatly appreciated. The homework doesn't have to be handed in or anything just to improve my knowledge. Thanks.

1. The problem statement, all variables and given/known data

11) demonstrate that the three vectors u=(1,3,2) v=(1,-1,1) and w=(5,-1,4) are mutally perpindicular.

12) if vector u=(5,-5,2) vector v=(1,8,-4) and vector w=(-2,-1,2) express vector x=(-3,6,8) in terms of vectors u v and w.

2. Relevant equations

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# Need help with Linear Combinations

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