place a 7m uniform 150N ladder agnst a frictionless wall at an angle of 75°. what are the reaction forces at the ground and wall and minimum coefficient of friction of the ground

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 jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

What is the result of adding the system of equations? 2x+y=4 3x-y=6