Explain how to regroup 43 ones as tens and ones

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]

Asquare parking lot has 6,400 square meters what is the length in meters

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?