- Solve this equation 4x + 15 =13?

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A 25.00 mL sample of a saturated Ca(OH)2 solution required 25.37 mL of 0.0200 M HCl to titrate it. Calculate the molar solubility of Ca(OH)2? Find Z and IT in a parallel circuit if R = 2.7k ohms and C = 330 pF when f = 50 KHz and V =4V / 0°.? What is the difference in PE between a 82.5 kg adult on a 1.25 m wall, and a 14.7 kg child on the same wall?. Answer=J? Has it ever snowed in Columbus, oh on april 19? How do I prove (with calculus) m=-b/(2a) (the formula for finding maxs and mins)?