Question

Solution Check,

http://imgur.com/bGQXqmO

Does this solution look correct given that the number of cars has to be a non-negative integer number?

http://i.imgur.com/Q6w9Pq3.png

Answer 1

Or do I have to include negative values of s and t?

Answer 2

Well it doesn't look like \(x_4=s\) and \(x_7=t\) can be negative, so I think your solution is fine as it is.

Answer 3

Yeah that is what I was thinking thank you.

Answer 4

np

Answer 5

btw is that an 80 on the bottom right of your rref matrix? I think it's supposed to be a 0.