Help - question 1 and 2

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.

Can anyone me get through my algebra 2 class? the only class i need to graduate..

2f(x)= x+3 if 4 < x < 8 2x if x 28 2