Which expression fits this description? • The expression is the sum of two terms.
• The first term is the product of 2 and a.
• The second term is the quotient of b and 4.
2a + (6 - 4)
2a +
(2 – a) +
(2 + a) + (6 - 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.