Hannah’s favourite cereal comes in 4 sizes. Which is the better buy? (Hint: check each one) * A, 200 g for $1.58
B, 400 g for $2.97
C, 775 g for $5.49
D, 1000 g for $7.52

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

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.