(x·2)+x(2^2)+(y·2^3)+(y·2^4)=42 solve for xy

True or false? many triangular shapes can be circumscribed about a given circle

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Pls me this is due today and i need i will make brainliest if you me answer correctly and i will report if you try to give me a dumb answer.