Question: 10. If u I v and | |ull = 1, | |v|| = 3, then (2u - 3v) . (3u + 20) = (a) -8

10. If u I v and | |ull = 1, | |v|| = 3, then (2u - 3v) . (3u + 20) = (a) -8 (b) -48 (c) -12 (d) 24 (e) none of these 11. What is a direction vector for the line of intersection of the planes x - 2y + 2 = 1 and 3x + y - 4z = 5? (a) (b) (c) (d) (e) none of these 1

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