How many cycles will you see from [0,2pi] in the graph y=2cos(4x)

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]

Which graph represents the function g(x) = |x + 4| + 2?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?