21. If u and v are collinear and the magnitude of u is 7 times the magnitude of v, write an expression that represents the
21. If u and v are collinear and the magnitude of u is 7 times the magnitude of v, write an expression that represents the sum of u and v. [2 marks] 23. A ship is on a heading of 040" at 20 knots and a 2 knot current is flowing from [110". Determine the resultant velocity of the ship to 1 decimal place. [4 marks]
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