1. Let x =     x y z t     Consider the following system of linear equation Ax = b    x + 2y + 3z + 4t = 0 x + 3y + 4z + 5t = 1 x + 3y + 5z + 6t = 1 x + 3y + 5z + 7t = 1 (a) Find an LU factorization of A, (b) Try to solve the above system of linear equation using LU factorization,

the first domain and range set to the left is matched with the top relation, and the second set the set in the middle goes with the bottom relation.

daren is correct because

except if the answer is in the value of money, then, it will matter. it will have to be $0.40, but i can tell this is not a money question, so .4 should be the right one.