Please help me out... ;-;
What is the area of this trapezoid?

On a piece of paper graph f(x)=5•(0.4)^x

(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

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).