Which proportion could be used to determine if the figures represent a dilation?

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

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

If the function m(x) has the point (5,2) on its graph name a point that would be on the funtion m(5x)