Find the Slope of the blue line on the grid *

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

15 point ! ~ see if you know the answer to both you!

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap