Amother is three times as old as her son, and in 11 years she will be just twice his age. find their present ages.

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?

Measures of the angle of r, 31 s (x+4) t (3x+9)

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8