Hey I am just wondering about this question... I have reduced it as much as I can and the second part of the question is asking about the rank of the matrix... which means the leading number of ones right? SO if I had this matrix 2 5 0 0 2 1 0 0 0 Wat would be the leading ones and would the last row be classed as leading ones? If ya can just giv a brief explanation that would be great! I understand wat I meant to be finding just am a lil unsure of the concept! Would the rank be 2?