Write an expression in simplified form to represent the area of the trapezoid 15 x^2 y
4x^2
9 x^2 y

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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 does the relationship between the mean and median reveal about the shape of the data