6. Which function has the line x = 15 as its axis of symmetry?
A f(x) = fx – 151
B f(x) = (x + 151
C f(x) = (x + 15
D f(x) = (x1 - 15

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.