Find the value of the expressions 3x^3-2y^3-6x^2y^2+xy for x=2/3 and y=1/2

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?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle