Tìm số số máy điện thoại có 10 chữ số với chữ số đầu tiên là 0553 A. 151200
B. 10000
C. 100000
D. 1000000

Which of the following questions is a statistical question? (2 points) how many professional sport leagues are there? where do the professional sport leagues play? how many hours of professional training took place over the weekend? how many hours do you spend each week training for a sports league?

What signals you that factoring by grouping is the best method to use when factoring a problem?

Answer question above and explain each step : )