## Power transferred to resistance

1. The problem statement, all variables and given/known data
Speaker Resistance = 10.4 Ohm
R = 8.20 Ohm
Maximum voltage of AC source = 15.0 V

What's the average power transferred to the speaker?

2. Relevant equations

P = $I^2R$
Imax = $I/2^0.5$

3. The attempt at a solution

I could the problem if there was only the speaker resistance. I don't understand how the other resistance comes into play or what it does in the circuit.
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