Please i want answers about this questions?

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?