Determine whether each angle is acute, obtuse, right, or straight. (In picture)
A. B. C. D. E.

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

Is the square root of 4 plus the square root of 16 rational?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c