Evaluate 24 divided by a + b when a = 6 and b = 12

To evaluate 24 divided by a + b when a = 6 and b = 12, plug in the given values:

24 ÷ (a + b)
= 24 ÷ (6 + 12)
= 24 ÷ (18)
= 8/3 or 2.67 (rounded to two decimal places)