Generally, all monarchs rule for life or until they abdicate.
Because they become a monarch after their parent's death (the previous monarch), they could be crowned only in their 50's and consequently rule for about 20 years.
However, it is not unheard of that very young people become monarch, such as Austrian Francis Joseph, or Queen Elisabeth, and then they can rule for over 60 years.
The Executive Branch of<span> our government interprets and enforces and applies the constitution to the laws. They can only do this with the help of the other two branches because they all keep each other in check. :)</span>
The answer is <span>a. to summarize the facts and statistics introduced in the paper</span>
Many, but not all, were sacrificed in a ritual human sacrifice in their Templo Mayor (modern name) - in fact, these people for sacrifice were one of the reasons they conquered.
Generally though, they were allowed to live their life and sometimes even keep their language and administration - as long as they paid tributes to the Aztecs.