not all scars show and not all wounds heal and sometimes u never truly see the pain that someone fells

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Which statement justifies why angle ebc measures 90?

Triangle knm is what is true about the sides of knm