Select all expressions equivalent to 6x-24. A. 6 (x - 4)
B. 2 (3x - 24)
C. 3 (2x - 8)
D. 3 (3x - 21)

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.