The sum of the angle measures of a quadrilateral is 360 degree . Write and solve an equation to find the value of x . the two numbers that are given are 100 and 100 and 120

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

This is different from the first one can someone me

(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