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9. Choose the best answer. Let u= (4, -7), v= (1, 2), w= (8, 3), c= 5 Find c.(u.v) 50 5 O -50 O 20

9. Choose the best answer. Let u= (4, -7), v= (1, 2), w= (8, 3), c= 5 Find c.(u.v) 50 5 O -50 O 20 O - 5 10. Choose the best answer. Given: u = -5i - 7j, v = -3i + 5j Find the answer: u - v -i+ 21j O 19j -171 + 32j -2i - 12j O -171 + 21j 00:34:58

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