10 of 11 Page 9 of 11 19. The vectors x and y are shown below. Draw a diagram, including the resultant, to show the vector calculation 3x-2y 20. Two forces of 20N and 40N act an angle of 40° to each other. Determine the resultant vectors of these two forces. 21. Given the points A(1,2,4), B(2,0,3), and C(4,4,4). Determine the Cartesian equation of the plane that contains these three points.

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