In which kind of economy are prices determined by supply and demand and by government actions?

Answer: Mixed Economy

Explanation: A mixed economy is a form of economics that combines two or more distinct economic models.

It is an economic system in which both the private and public sectors participate. The mixed economy exists in many capitalist countries, notably in the social democratic regime.

In the mixed economy, the State, in addition to guiding the economy, has the ownership of important companies in strategic sectors (banking, manufacturing, transport, health and education).