PLEASE CAN U HELP ME ​

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

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

At which value in the domain does f(x) =0?