The Hebrew text has more than just "'am" for the expression in the question. Consider the interlinear for this verse.
So for the first question, the "extra" words are in the Hebrew.
As for the second question, again, there are those "extra" words in the text that intervene between "Messiah" and "people" ...
Verses 29-30 say that Antiochus’ fourth invasion would not end in his favor. The last invasion “shall not be like the former or the latter.” 29
What prompted this fourth invasion was the unification of his nephews, Ptolemy VI and Physcon (Ptolemy VIII). Both had come to suspect the plans of Antiochus and agreed to join their forces and rule Egypt jointly. ...
Let us begin with the Hebrew - in Dan 11:30 the operative word is כִּתִּ֖ים (Kitti or Kittiyyi but always plural) whose meaning is given in the appendix below which occurs just eight times in the OT as listed below.
Hebrew (MT) - NASB
The sons of Javan were Elishah, Tarshish, Kittim, and Dodanim.
And the sons of Jovan, Elisa, and Tharseis, ...
Daniel 3:19 How do they heat the furnace seven times more than it was usually heated?
"Seven times" probably wasn't literal.
It might have to do with Babylonian religion.
According to the Babylonian mythology, there were seven demons, named “Maskim,” who were the most formidable of the infernal powers. Perhaps the number “seven” has a ...
While the Bible does not indicate exactly how this was done, there are two logical points upon which such measures may have been made: upon the fuel and upon its oxygen.
People of ancient times were well-versed in making brick and in burning it thoroughly to make it strong.
At the tower of Babel, for example:
And they said one to another, Go to, let us make ...