10)

11)

12)

13) (your answer is incorrect)

14) (your answer is incorrect)

15)

16)
-expression to represent this situation

Answer: In 1 group 57 students
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P.S. Hello from Russia :^)
Equal because 30 is the median and when you find the mean, it is also 30. Please give brainliest!
The answer on APEX would be $2430
The one that is less because if you use more you wound have any later
Answer: Which question?
Step-by-step explanation: