What is the center of the circle with the equation (x-1)2 + (y-3)2= 9?

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)

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

When is g(x) = 0 for the function g(x) = 5.23x + 4?