The Frosty Ice-Cream Shop sells sundaes for $2 and banana splits for $3. On a hot
summer day, the shop sold 8 more sundaes
than banana splits and made $156. Which
system of equations could be used to find the
number of sundaes, s, and banana splits, b,
that the shop sold that day?

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.