Plz help 8k-- 5k combine the like terms to create a equivalent expression

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

(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

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.