What are the x-intercepts of the parabola? y=-3(x+5)(x-9)

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Ineed with number 6 , explain how to get 1978

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x