What is the y-value for the vertex of the quadratic equation y=-(x-3)^2-12

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit

Select the two pairs of figures that are similar.

Let x = a + bi and y = c + di and z = f + gi. which statements are true?