1. an early system of ? developed during the first industrial revolution.

2. the factory system before the civil war used fewer ? in producing goods.

3. hiring ? in the first industrial revolution meant production costs dropped.

1. Steam engine

2.the factory used fewer domestic system or manual labor

3.the hire of unskilled labor

Explanation:1- the industrial revolution is also known as the first industrial revolution.

The development of the steam engine was an important element of the era.how ever during the early period of the industrial revolution most industrial power was supplied by water and wind and the first successful piston steam engine was introduced by THOMAS NEWCOMER before 1712

2-the factory system was a new way of making production the began during the industrial revolution.the factory system used powered machinery, division of labor, unskilled workers and centralized workplace to mass produce product.

The factory replaced the domestic system in which individual workers using hand tools or simple machine.the use of water power and steam engine to mechanize process such as cloth weaving began during the 18th century.

3- with the introduction of steam engine it reduces the hiring of skilled individual and at fewer number which also dropped the cost of production since few we're needed to operate the machines

a, both were musicians during the jazz age