Combine like terms 5a -2b - 6 + 3a + 6b

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?

What is the distance between point a and b

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?