4. The expression (3x –8)(2x+5)-(x+1)(2x+5) can be written as the product of 2x+5 with what other binomial?
(1) 4x-7
(3) 2x-7
(2) 2x-9
(4) 4x-9

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.