I need help pleaseee

Which statement is not always true for a parallelogram? (a) opposite sides are congruent. (b) diagonals bisect each other. (c) it has 4 congruent angles. (d) consecutive angles are supplementary.

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0