Final answer:
When combining Reaction 1: A -> 2C and Reaction 2: C -> B, the overall reaction is A -> B.
Step-by-step explanation:
When combining Reaction 1: A -> 2C and Reaction 2: C -> B, we can determine the overall reaction by substituting the intermediates into the given reactions. In this case, we substitute 2C from Reaction 1 into Reaction 2, resulting in: A -> 2C -> B. Therefore, the overall reaction is A -> B.