What does the y-intercept represent in this situation?

Name the quadrilaterals that have four equal sides.

Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle