Which expression is equal to (f + g) (x)? f(x) = x^2 + 3; g(x) = x - 1 a x^2 + x + 2 b x ^3-3 c x^3-x^2 + 3x -3 d x^2 -2x +4

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.