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I am doing review for my algebra and need to know what kind of problem this is. It is 2x+4 / x+3 times x squared -9 /2 =-6? Actuary exam? Where can i buy sodium phosphate? Assume that the average person consumes 20 meals per week? (u=20) what is the most logical standard deviation? How to make a 12V DC to 220V Ac inverter?