- Which of the following equations has four roots? A. 5x^4+x-7=0 B. (x-4)(x+2)(x-7)=0 C. 4x^3+8x-4=0?

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I'm 58 and she's 33 and we've known each other professionally for two years. We never talk about the chemistry. But we know. Body language? Can yall please help me with this physic question? What is the hydroxide ion concentration in an aqueous solution where the pH = 5? Balance chemical equation: -Na2S2O3(aq) + -Cl2(g) +-H2o(l)-> -NaHSO4(aq) +-HCI(aq)? Can 875 mg of amoxicillin twice a day treat a UTI? Sin(2x) = 1/3, cos(2x) > 0. What is the values of tan x?