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pros and cons of traditional economy

Are these quadrilaterals parallelograms? (quadrilateral ABCD with diagonals intersecting at E) 1. AB is congruent to AD and AB is parallel to DC 2. AB and DC are congruent and parallel 3. DE and BE are congruent

If ABCD is a rectangle with center Z (where the diagonals bisect), and AC = 3x+11 and BD = 2x+31, what is x?

Given the formulae for calcium ion is Ca2+ and carbonate ion is CO32-. Choose the correct chemical formula of calcium carbonate.

a cd-rw is a type of

that guy probably wasnt having a good day