The average age of the 12 people in a classroom is 10. After Ms. Xu walks into the room, the average age of everyone in the classroom increases to 12. How old is Ms. Xu?

24

Step-by-step explanation:

First: 12*10=120

Then: 12*12=144

=> Ms. Xu's old: 144-120=24

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

answer: what is the conflict?

step-by-step explanation:

*what has happened to new york city?

*what is in the time capsule?

* what did the kidz see that gave them hope?

*what will they do with what they find?

* how will they save the city?

* what challenges will they face along the way?

*what big choice will they make at the climax of the story?

* what lesson do they learn at the end of the story?