Joe wants 200 euros. The exchange rate is (1.8 dollars)/(1 euro)Joe wants 200 euros. The exchange rate is (1.8 dollars)/(1 euro). How many dollars must he give? (1.8 dollars)/(1 euro) = (x dollars)/(200 euros) What is the value of x?. How many dollars must he give? (1.8 dollars)/(1 euro) = (x dollars)/(200 euros) What is the value of x?

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.