Which of the following statements about parallelograms is not always true? a. diagonals are congruent. b. opposite sides are parallel. c. diagonals bisect each other. d. opposite angles are congruent.

I think the correct answer from the choices listed above is option A. Diagonals are congruent is not always true for parallelograms. The diagonals can be equal or not equal in length so long as other characteristics of a parallelogram are present.

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.