Twice as old as" means we will be multiplying by 2. "her cousin" - we need a new variable C to represent her cousin's age. "was three years ago" - 3 years ago means we will have to subtract 3.
I believe the term you are looking for is puberty.
Answer: When people become addicted to any form of drug you'll often spot mood swings and mental health issues. Fidgeting is common amongst some.
Hi !
Answer:
<em> It's called gonadotropin-releasing hormone, or GnRH for short. </em>