The ratio of numbers who wear glasses to the total class is 2: 5 what is the ratio of students who wear glasses to those who don't

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts.which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.