plz question below 20 only answer with explanation

(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

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

You work in a hospital that has 9 floors. you need to see 3 patients on each floor. how many patients do you need to see in all?