The constitution's necessary and proper clause is the source of which federal powers?

The power to create new laws that they consider "necessary and proper".

Explanation:

Proper and necessary clause is also called "elastic clause" Necessary and proper clause is found n Article 1, Section 8, clause 18 of US constitution. It allows the congress to pass laws that it considers necessary to carry out the the enumerated powers. Elastic clause was added to the Constitution in 1787.

Enumerated powers are the powers that are granted to the federal government in Article 1, section 8 of the constitution, it includes the power to declare war, regulate commerce, coin money. establish post office and maintain armed forces.

implied powers.

Explanation:

The Necessary and Proper Clause is also known as the Elastic Clause, officially made up as Clause 18 of Article 1 of the Constitution of the United States. Congress is limited in its control over the American citizens to certain rights that are expressly enshrined in the Constitution, such as deciding who may be a voter, collecting taxes and setting up a judiciary. The presence of the set of powers ensures the Congress will make legislation appropriate to ensure that such powers can be exercised and Clause 18 makes that clear.