Answer:
speed = distance/time (or s = d/t)
The answer is c : developing a complex system of writing
The answer is "True".
You see the position of your seat has actually nothing to do with the effectiveness of your head rest as you position the seat, the head rest will likewise move, influencing a person to change his or her level of comfort as he or she sits or rests.
The correct answer is the plow. When the plow was invented agriculture was made much easier which enabled people to settle around and make surplus of food. This enabled them to trade with others and increase the size of the cities and the rest is history.
Patrick Henry and Thomas Jefferson were the men who represented the anti-federalists in the ratification battle. Hope this helped :)
