Three of the thirty computers are out of service. what percentage of computers are working?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

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?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)