Find (a) u + v, (b) 2v, (c) u -v, (d) 3u - 2v when u (1, 2, 3), v (0, 1,1) 2. solve for x, where u (1,-1, 2), w: (0, 2, 3), and w # (0, 1, 1). 3x + 2u-v + 2w-0 ans 3. write v as a linear combination of u, u2, and u, if possible. v- (4, 4, 5), , 2, 3) ans:

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.