During which period did energy use increase exponentially

Post-industrial agriculture and modern industrial

Explanation:

During the Post-industrial agriculture and modern industrial period the energy consumption increased exponentially. It is so because new methods were formulated to run machines through the energy input which shall ease the work requiring human efforts.

After the industrial revolution, various kind of engines such as steam, diesel and electric engines were developed which required lot of energy for functioning adequately. Since the post industrial phase to till today, every aspects of our life is governed by some form of energy input.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

it would be heredity