How do I point it on a graph

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]

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?