Giúp mk từ câu 17 đến câu 31 vs ạ
K
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BH
Bà HOÀng Thả ThÍnh
16 tháng 5 2020
Đề đây ạ
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Những câu hỏi liên quan
TH
1
VT
9 tháng 3 2022
6. B
7. D
8. C
9. A
10. A
11. A
12. A
13. A
14. B
15. C
16. B
17. C
18. A
19. C
DH
1
2 tháng 4 2022
b:
=>x(y-3)+3(y-3)=17
=>(y-3)(x+3)=17
\(\Leftrightarrow\left(x+3,y-3\right)\in\left\{\left(1;17\right);\left(17;1\right);\left(-1;-17\right);\left(-17;-1\right)\right\}\)
hay \(\left(x,y\right)\in\left\{\left(-2;20\right);\left(14;4\right);\left(-4;-14\right);\left(-20;2\right)\right\}\)
a: =>x(2y+3)+2(2y+3)=5
=>(2y+3)(x+2)=5
\(\Leftrightarrow\left(2y+3;x+2\right)\in\left\{\left(1;5\right);\left(-1;-5\right);\left(5;1\right);\left(-5;-1\right)\right\}\)
hay \(\left(y,x\right)\in\left\{\left(-1;3\right);\left(-2;-7\right);\left(1;-1\right);\left(-4;-3\right)\right\}\)
K
22 tháng 2 2022
1. played
2. Did - go
3. didn't study
4. has
5. has
6. Does - live
7. are meeting
8. are visiting
9. isn't reading
10. didn't go
11. didn't watch - did
12. met
13. rained
14. fly
15. fries
16. closes
17. didn't go
18. taught
19. did - do
20. met
21. didn't go
22. isn't painting
23. aren't planting
24. Are - making
25. is repairing
26.
2 tháng 4 2022
=>x(y-3)+3(y-3)=17
=>(y-3)(x+3)=17
\(\Leftrightarrow\left(x+3,y-3\right)\in\left\{\left(1;17\right);\left(17;1\right);\left(-1;-17\right);\left(-17;-1\right)\right\}\)
hay \(\left(x,y\right)\in\left\{\left(-2;20\right);\left(14;4\right);\left(-4;-14\right);\left(-20;2\right)\right\}\)
CT
1
DT
Đỗ Thanh Hải
CTVVIP
4 tháng 5 2021
11 She asked me if I like English music
12 Two department stores have been built
13 The computer is being used at the moment
31 We should avoid playing computer games because it will hurt our eyes
32 Rescue workers sent water and food to victims yesterday
33 I like to travel to Europe but I don't have enough money
34 Our children will be taken care of by robots in 20 years' time