If the following quadrilateral is a parallelogram select the conditions that are met with the given information. If none of the conditions are met, select "not a parallelogram".

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.