No.4 please solve this ..​

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

Asap (i need to finish this quick) graph complete the sequence of transformations that produces △x'y'z' from △xyz. a clockwise rotation ° about the origin followed by a translation units to the right and 6 units down produces δx'y'z' from δxyz.

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?