Write an expression that is equivalent to. please help

6.3x+14 and 1.5x-6 answer in simplified form

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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.