Dependent/Combination Vectors

1) Let V be a vector space and . Show that the following vectors are linearly dependent.

So is it...

[ 1 1 0 9 0 ][a] = [0]

[ 1 -3 1 0 23][b] = [0]

[ 1 6 0 7 -1][c] = [0]

[-44 0 1 5 -1][d] = [0]

?

Will that not give a=b=c=d=0, which is not really a lot of use because could that not just be applied to any combination of vectors? I thought about using Gaussian elimination but again thats not gonna work and i dont know how to use it on an m x n (m not equal to n{whats the latex for this?}) matrix. So how do you do it?

2) Write w as the linear combination of the vectors

Now i can see almost straight away that but im not sure if the correct method to actually solve these. Is there one? Guassian Elimination?