Giao điểm của 2 đường thẳng là nghiệm của hệ:
$\begin{cases}2x+y-1=0\\x-2y-3=0\\\end{cases}$
`<=>` $\begin{cases}x=1\\y=-1\\\end{cases}$
Mà `C(1;-1)` nằm phía trên trục hoành.
`=>` ĐPCM.
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Giúp e vs ạ! 1. Alison/ often/ watch/ TV/ after dinner 2. I/ read/ all/ play/ Shakespeare. 3. She/ not like/ disturb/ when/ she/ work. 4. Jack/ not spend/ much time/ read. 5. They/ live/ that house/ ten years. 6. We/ work/ this company/ 2008. 7. John's friends/ play/ football/ Sports Centre. 8. Peter/ not like/ buy/ food/ supermarket. 9. President/ travel/ more than twenty/ country. 10. I/ do/ housework/ moment.
I'd like.................. (join) your club.
4. Miss Van is a journalist. She (not write) for Lao Dong Newspaper. She................. (write) for Nhan Dan Newspaper.
2. What your sister....................... (do) now? - She.................. (cook) dinner in the kitchen.
Read the passage then check true or false sentence (2 pts) Lan is 12 years old now. she will be 13 on her next birthday, May 25th. She will have a party for her birthday. She will invite some of her friends. She lives at 24 Ly Thuong Kiet Street. The party will be at her home. It will start at five o'clock in the evening and finish at nine. 23. Lan is 13 now 24. She will be 12 on her next birthday 25. The party will be at her school 26. She will not invite any friends 27. The party will start at five in the evening 28. It will finish at nine
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