Dinner at the restaurant was $90. The server was tipped 15 percent of the cost of dinner The server was tipped how much money? , what is the total cost of the dinner?

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]

In the diagram of circle a what is m

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?