Final answer:
The equation (p - 3) = 7p seems to be irrelevant; to find b when p equals 10, we use the formula b = 2p^2, which results in b equalling 200.
Step-by-step explanation:
To answer the question, 'If b = 2p^2 and (p - 3) = 7p, find b when P = 10', it seems there is a mistake in the equation provided since (p - 3) = 7p is not true for all values of p and does not help us to find b when P = 10. Fortunately, we only need the first equation b = 2p^2 to answer the question. So, we simply substitute p with 10. b = 2p^2 becomes b = 2×10². Calculating 10 squared (10²) equals 100, and then multiplying by 2 gives us 200. Therefore, b equals 200 when p equals 10.