Cho ma trận A = và B = A – 3At . Tìm ma trận B-1

Which question is not a good survey question? a.don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d.are you happy with the availability of electronic products in your state?

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.

Two numbers have a sum of -19. one number is x. what expression represents the other number?