Which of these sets of side length are pythagorean triples? check all that apply

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

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Rationalize the denominator- 12x/√x-10