Ineed so much on this question, every time i put an answer in it says it’s wrong and i don’t know why.

Quadrilateral abcd is a parallelogram with diagonals that intersect at point e. which of the following statements is true?

The lengths of two sides of a triangle are 9 and 15. what can be said about the length of the third side? a. it must be greater than or equal to 6 and less than 24. b. it must be greater than or equal to 6 and at most 24. c. it must be greater than 6 and less than 24. d. it must be greater than 6 and at most 24.

The difference between the measures of two complementary angles is 14. find the measure of both angles.