Hi i need some help with these two questions.. I'll pick brainliest if i get a 100 on the homework i am doing... :)

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

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 price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?