giải bất phương trình x² + 3x +1 < 0

Tổng số dầu ở hai thùng lúc đầu là :

      120 - ( 15 x 2 ) =90 ( kg )

Vậy lúc đầu thùng thứ nhất có số l dầu là :

      ( 90 + 30 ) : 2 = 60 ( kg )

                           Đáp số : 60 kg

Tick mình đi các bạn ơi!!!!!

2. Viết lại câu

1, How a clever boy he is!

2, What is the time?

3, How much do these shoes cost?

4, They always go to school on time

Văn bản là một bức thư của người bố gửi cho con, nhưng tại sao tác giả lại lấy nhan đề “Mẹ tôi”?

Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.

It is unlikely that he will come on time.

A. He is unlikely to come early.

B. It is likely that he will not come too late.

C. It looks as if he will come late.

D. It seems that he will come lately.

If the pollution continues, what will happen

In most big cities, there are many wealthy people but poverty is still a problem

People should use solar energy more because it is unlimited, clean and cheap

Many people prefer to live in the country

You shouldn’t have leaked our confidential report to the press, Frank! said Jane

A: Jane criticised Frank for having disclosed their confidential report to the press

B: Jane suspected that Frank had leaked their confidential report to the press

C: Jane accused Frank of having cheated the press with their confidential report

D: Jane blamed Frank for having flattered the press with their confidential report

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Peter asked me _____in English.

A. what does this word mean

B. what that word means

C. what did this word mean

D. what that word meant