SOLUTION: If x is divisible by 3 and y is divisible by 5, which of the following must be divisible by 15? I. xy II. 3x + 5y III. 5x +3y A. I only B. III only C. I and II only D. I

Algebra ->  Divisibility and Prime Numbers -> SOLUTION: If x is divisible by 3 and y is divisible by 5, which of the following must be divisible by 15? I. xy II. 3x + 5y III. 5x +3y A. I only B. III only C. I and II only D. I      Log On