$(1)⇒\frac{y}{2}=0,25-x$
⇔$y=0,5-2x$
Thế vào $(2)$⇒137x+R(0,5-2x)=23$
⇔$137x+0,5R-2Rx=23$
⇔$(137-2R)x=23-0,5R$
⇔$x=\frac{23-0,5R}{137-2R}$
⇔$x=\frac{0,5R-23}{2R-137}$
Còn gì hông hỉu hỏi mềnh bên dưới
Rewrite the following pairs of sentences as a single sentence containing a relative clause. (There may be more than one correct answer). 1/My friend lives next door. My friend's name is Sally. 2/ I spoke to a sales assistant. she had red hair. 3/ Joe found the coins in a field. He took his father there. 4/ The phone never worked again. I dropped it 5/ THis painting is beautiful. I have never seen such a beautiful painting like this
ko làm câu A ạ, mn làm giúp mk câu B thôi ạ~
Giúp mình với mình cảm ơn các bạn
Giúp với ý 1, 2, 3 mk biết làm r
4 complete the text about ann's room with there is there isn't there are there aren't in my room there's a bed and ... a wardrobe for my clothes ...any chairs and ... a desk ......a small table ...two clocks on the tabble and on the wall . on the wall ..... a mirror and ...some pictures there are some other things in my rooms ...a cupboard and ..some books and roys in it but ..acomputer and .. a television
I. Rewrite the following sentences so that they have the similar meaning. Begin with the given words. 1. You should take more exercises because that's the way to get fit. If _______________________________________________________________________________ 2. We can't do the job if we don't get help. Unless _______________________________________ 3. If I were you, I wouldn't do that. You should __________________________________________ 4. The sounds from a vacuum cleaner can result in permanent hearing loss. (Using “ lead ”) The sounds ________________________________________________________________________ 5. Lan‟s team performed more successful than Mai‟s team. Mai‟s team performed _______________________________________________________________ 6. Motorbikes go more slowly than cars. Cars go ________________________________________ 7. One year ago, the builders built a new bridge in our hometown. A new ____________________________________________________________________________ 8. My house is taller than your house.Your house ________________________________________ 9. I love listening to music. I like ____________________________________________________ 10. The black dress is more expensive than the white one.The white dress ______________________ 11. We don‟t use oil lamps any more. We used ___________________________________________ 12. No one in my group is more intelligent than Mary. Mary _________________________________
Vẽ chibi và viết lời bài hát "nếu anh không phiền" ra một tờ giấy Chứ mik thấy nhiều ng copy mạng rồi gửi lắm:)
Làm phép nhân: $\frac{x^2+y^2}{x+y}$ $.$ $\frac{(x-y)^2}{x^2}$ $-$ $\frac{y^2}{x+y}$ $.$ $\frac{(x-y)^2}{x^2}$
em hiểu thế nào về ý nghĩa của câu văn:dù ốm ko muốn ăn nhưng hãy nhớ đến công ng nấu cháo
em hiểu thế nào về ý nghĩa của câu văn:chúng phải đc trưởng thành khi đc mở rộng tầm nhìn,thu nhận thêm những kinh nghiệm mới
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