The real number -5 belongs to witch set of numbers?

natural numbers
irrational numbers
integers
whole numbers

For what values of b will f(x)= logbx be a decreasing function? (16 )

Brent wants to know what is 5 x 1/2

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?