This is NOT for a graded paper, as my other thread was closed. I have a test on Friday, and I'm trying to understand spans. I just attached it because I thought it would be better formatted.

Here are the typed questions instead:

Show that the vectors (1,2-1),(3,1,1),(1,1,0),(1,-3,3) are linearly dependent by writing the zero vector as a nontrivial linear combination of them.

When is the vector (x,y,z) in the span of {(1,2-1),(3,1,1)(1,-3,3)}?

Hope that's better, as I still need some help.

Thanks