Which is a valid prediction about the continuous function f(x)?
O f(x) 2 0 over the interval [5, co).
O f(x) s 0 over the interval [-1, ∞o).
O f(x) > 0 over the interval (-00, 1).
O f(x) < 0 over the interval (-∞0. -1).

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 values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Use circumcenter theorem to solve for the given values