cho mình hết âm nhé

1008 tấn = 10080 tạ

Số chuyến xe cần có là:

   10080:90=112 chuyến

       Đáp số 112 chuyến

14.4.

1, The course leader divided her students in five groups

\(\rightarrow\) in \(\rightarrow\) into

2, They had to trace everyone who had been exposed for the infection

\(\rightarrow\) for \(\rightarrow\) to

3, At the moment we have too few nurses attending at too many patients

\(\rightarrow\) at \(\rightarrow\) to

4, Excellent teaching coupled for first-class research have made this a successful college

\(\rightarrow\) for \(\rightarrow\) with

[ Tớ sửa chữ first lại nên in nghiêng nhé ]

5, The country emerged off the crisis as a much stronger power

\(\rightarrow\) off \(\rightarrow\) from

6, Joe got an interest in politics from his uncle who often spoke over his days as a senator.

\(\rightarrow\) over \(\rightarrow\) of

7, The goverment called to an investigation into the explosion at the nuclear reactor

\(\rightarrow\) to \(\rightarrow\) for

8, In your speech don't forget to emphasise on the advantages of studying here \(\rightarrow\) Bỏ on

=>(x+1)+31 chia hết cho x+1

Mà x+1 chia hết cho x+1

=>31 chia hết cho x+1

=>x+1 thuộc Ư(31)={1;31;-1;-31}

=>x thuộc {0;30;-2;-32}

Vậy x thuộc {0;30;-2;-32}