HELP PLEASE What economic system was used by both the ancient Egyptians and ancient Mesopotamians, and made it easier for them to trade with each other?
a:barter system
b:system of taxation
c:command economy
d:gold-based currency

8) this map shows the population density of india. the redder the area, the higher the concentration of the population. which is the most likely reason for the high population density in the northeastern part of india? a) there is little pollution there b) the ganges river is in the region c) most of the factories are located in that region d) most people want to live close to the himalaya mountains

To what kinds of messages might the brain respond to keep you balanced on one foot?

The president vetoes a bill proposed to become law by congress. in this situation, what happens to the bill?