Check all that apply. (N/3)
is the reference angle for:

A.
2n/3
B.
19n/3
C.
7n/3
D.
15n/3

Two lines parallel to a third line are parallel to each other. always sometimes or never

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 expression is equivalent to 42x-56y