NEED HELP! I JUST NEED HELP ON 31 PLEASSEE HELP

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

He concluded that a heavier object dropped from the same height as a lighter object will land

Solve 3x-18=2y and 5x-6y=6 by elimination show work