Question 9 The intersection of the planes x+y=2z = 1 and 2x - y + z = 4 is a line. This line intersects the xy-plane at which point? (a) (5,-2,0) (b) (-2,5,0) (c) (5/3,2/3,0) (d) (3,2,0) (e) none of the above

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