III. 

A. 

1. B

2. C

3. B

4. A

5. D

B. 

1. C

2. B

3. B

4. A

5. C

1 b c b a d

2 c b b a c nha

1 The meeting was canceled 3 days ago

2 She told me she was watching a film with her sister then

3 I admire the guitarist who is perfroming on the stage

4 Had it not been for Pauline's interest, the project would have been abandoned 

IV. 

1. The meeting was canceled 3 days ago.

2. She told me shewas watching a film with her sister then

3. I admire the guitarist who is performing on the stage

4. Had it not been for Pauline's interest, the project was abandoned. (chắc thế)

103,130,202,220,301,310,400

103,130,112,121,202,220,211,301,310,400

202; 112; 400

1+5+3+9+5+7=30

Bằng 30 nha

k Đúng cho mình nhá

30 nhe bn

16,2 nhe . nho k mik ^ - ^

ta có: 30,9-28,2+25,5-22,8+....+3,9-1,2

=(30,9+25,5 +...+ 3,9)-(28,2+22,8+...+1,2)

=[(30,9+3,9)*6 : 2 ]-[(28,2+1,2)*6 : 2]

= 104,4-88,2

=16,2

16,2 bạn nhé

=4090506-\(\dfrac{3}{2023}\)*2021+2020

=4090506-\(\dfrac{6063}{2023}\)+2020

=\(\dfrac{8279174035}{2023}\) tối giản luôn rồi nhé

=> 1 - 3 . X=x - 7 hoặc 1 - 3 . X =-(x-7)

*1 - 3x =x - 7                 *1 - 3x = -(x - 7 )

   8         =x + 3x             1 - 3x = -x + 7     

   8         =4x                   -3x+x =7-1

   8 : 4     =x                    -2x    =6

    2          = x                      x   = 6:(-2)

  =>x = 2                            x    = -3

vậy x \(\in\){2; -3}

đúng + x  =1

           x   =1 -đúng 

           x    = thích