If 21 students write their names on pieces of paper and put them in a hat, what is the probability that the first student who draws will draw his own
name?

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?

Polynomial that can be factored as (3x-4)(3x+4)

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12