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80.625=645e-^(0.115x) solve for x? 1. Identify the lines that are perpendicular. y=6, y=1/5x+2, x=5, and y+3=-5(x+4).? How to solve this question? I just don't need answer and need to understand this. Explanation is highly appreciated.? HELP! Predict the equilibrium concentration of H+ in a 0.25 M solution of H2SO4-? Ka2=0.012? How many turnips exist?