1. Not sleeping
2. His brain cant function properly due to him being tired
3. Get some sleep or get a schedule to efficiently practice mathematics
Pls mark as brainliest
The answer would be thete are not enough of them
Answer:
Look below
Explanation:
It is a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
Hope it helps!!
