Final answer:
The question is about calculating equivalent resistances in an electric circuit, which is a key concept in high school level Physics. The student must understand how to combine resistors in series and parallel to simplify the circuit analysis.
Step-by-step explanation:
The subject of this question falls under the category of Physics, and it is specifically related to the topic of electric circuits. The problem involves understanding the concept of equivalent resistance in electrical circuits. When combining resistors in series, their resistances add together to form the equivalent resistance. Thus, for two resistors R1 and R2 with resistances of 50 Ω and 30 Ω respectively, their series equivalent resistance R$1 would be R1 + R2 = 50 Ω + 30 Ω, resulting in 80 Ω. The same principle applies when combining resistors in parallel, though the method involves the reciprocal of the sum of the reciprocals of each resistance. For example, replacing Rs1 (25.71 Ω) and Rs2 (20 Ω) which are in parallel, with their equivalent resistance Rp2, would follow the formula 1/Rp2 = 1/Rs1 + 1/Rs2. Once all equivalent resistances are calculated, they can be combined accordingly to simplify the electrical circuit analysis.