1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution I am trying to find the equivalent resistance for part b. First, we turn off independent sources. We open circuit the 2A source and we close circuit the 30V source. We're left with two resistors. Are they in series or parallel and why? I think it is in series because there's no other elements other than the two resistors.