Under the state court system, what is meant by common law?

A common law system is the system of jurisprudence that is based on the doctrine of judicial precedent, principal under which the lower courts must follow the decisions of the higher courts, rather than on statutory laws.

A common law system is the system of jurisprudence that is based on the doctrine of judicial precedent.

no, the constitution said nothing about adding territory. president jefferson said he had authority to make treaties so he called the purchase a treaty.

asthenosphere/ lithosphere would be the answer