Question

what were 9 weaknesses of the Articles of Confederation and how would they fix under the Constitution

Answer 1

The Constitution fixed the weaknesses by allowing the central government certain powers/rights. Below are some of the items the Articles did not address:

Constitution became the supreme law of the United States.
Congress now has the right to levy taxes.
Congress has the ability to regulate trade between states and other countries.
Creation of a federal court system.
Executive branch with power of checks and balance for legislature and judiciary.
Amendments are easier by being ratified if 2/3 of congress and 3/4 of house pass it.
Representation in house is based on population, while senate are equal to all other states.