- Help solving these equations with the exponent laws?

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Find integers x and y such that 57x+79y=17, and 400 A 25.0mL solution containing .60M HCl was titrated with 0.50M NaOH. Calculate the pH before the titration and at equivalence point? In equal-tempered tuning the frequency (in Hz) of the note one tone above 220 Hz is...? How do i find price elacity for a quasilinear function? Step by step? If you started with 3.60g of Copper and reacted it with an excess of nitric acid what mass of copper hydroxide would you expect to recover?