What is 1/3 of 9 if u know tell me

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

Which is the graph of this function 3 square root of x plus one if

Write the equation in general quadratic form: plz !