What is the radius of a circle whose equation is (x + 5)2 + (y – 3)2 = 42? a).2 units b). 4 units c).8 units d).16 units

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.