In Mr. Dalle’s class, 13 students wear glasses and 9 do not. What is the ratio of students who do not wear glasses to the number of students who wear glasses? A.9 to 13
B.9 to 22
C.13 to 9
D.13 to 22

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?