What is the term given to the event of many white families leaving cities for the suburbs?

What is the primary purpose of a game reserve?

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)