araceli4567ac araceli4567ac 23-09-2020 Mathematics contestada 1. What is the value of 5a + 2b when a = 2 and b = 6 ? 2. What is the value of b^2 - 5 when b = 5 3. What is the value of (a^2 + x)/y when a = 4, x = 6 and y = 2 can someone explain also. Thank you.