If f(x) = x2 - 2x, which expression is equivalent to f(i)?

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?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Can you me find the slope! (30 points)