a,2(x+55)=60
=>x+55=60:2
=>x+55=30
=>x=30 -55
=>x= -25
mà x thuộc N => ko cs giá trị x thỏa mãn
b,12x-33=$3^{2015}$ :$3^{2014}$
=>12x-33=3
=>12x=3+33
=>12x=36
=>x=36:12
=>x=3
Đáp án:
Giải thích các bước giải:
Viết lại câu 1.He last drank wine 2 years ago-> he hasn't.... 2. Despite the bad weather, we went out for a picnic. -> althought..... 3. My parents told me " We will visit you this week" -> My parents told me .... 4. "I hve finished my work" my sister said to me -> My sister... 5. I'll give you a call immediately I have finished my home work-> As soon.... 6. I don't remember exactly when my parents started this workshop -> I.....set..... 7. Although the weather was bad, we went yo the zoo -> Despite ........ 8. I started to work for the company a year ago -> I've..... 9. " Iam studying hard for the coming exam" Mai said -> Mai said..... 10. " Where we can get the tickets?" He wondered -> He wondered......... 11. I began stydying French last year -> I have............. 12. He had a headache yesterday, but he still went yo work -> Althought.......... 13. The teacher says that no student in the shool is noisier than I am -> The teacher says that Iam...........
4. Hoàn thành các câu sau, sử dụng so sánh nhất, so sánh hơn hoặc so sánh kép 4.7. Everest is higher mountain in the world. It is………………... than any other mountain. (high) 4.8. We had a great holiday. It was one of………………...holiday we've ever had (enjoyable) 4.9. ………………...my grandparents get,………………...they are. (old – happy) 4.10. ………………...it is, ………………...Hoa is. (hot – weak) 4.11. Life got ………………...for Viet as the company became ……………….... (good – successful) 4.12. ………………...we eat, ………………... we get. (many – fat)
3a Read the passages and match them with the pictures. Reykjavik in Iceland is one of the world's healthiest cities. Its people often do activities outside, even though it's very cold. They go hiking, and swimming outside! Also, Icelandic people eat more healthy, fresh fish - it is an island, a. after all. 2. Tehran, capital city of Iran, is not a healthy place to live. The air pollution is very bad, so people stay at home on 'smog holidays' - days when the air is full of smoke ahd it is unhealthy to go out. b. 3. Glasgow in Scotland has a problem with obesity. Almost 40% of people in this city are obese. Scotland is cold, Here that means C. people watch more TV, play more computer games, and do less exercise than in other countries. They also eat a lot of junk food. tick () the place that each statement refers to. Tohran Scotland
3 √2 + 2√3 / √2 + √3 - 2 / √6 -2 dấu gạch chép là phần đó nha mng giúp mình
Giúp mik vớii cảm ơn mn nhìu lunn :3
5. Viết lại những câu này dựa trên những gợi ý đã cho mà không thay đổi nghĩa gốc. 5.1. My brother was earning much less in his previous job than he is now. →……………………………………………………………..more 5.2. As her father gets older, he wants to travel less. →……………………………………………………………..The older - the less 5.3. To my knowledge, speaking English is easier than listening to conversations in English. →…………………………………………………………….harder 5.4. As this road gets busy, it becomes dangerous. →……………………………………………………………..The busier - the more 5.5. This is the fastest moving car I’ve ever driven. →……………………………………………………………..faster 5.6. There isn’t anywhere as old as this castle. →……………………………………………………………..oldest 5.7. Have you got any bigger shirt than that one? →……………………………………………………………biggest 5.8. I am not taller than anyone in the class. →……………………………………………………………..lowest
Giúp mình bài này với ạ! Mình đang cần gấp! Mình sẽ vote 5 sao ạ!
ĐÚNG VÀ ĐỦ LÀ CTLHN LUN 60 ĐIỂM Ó!
So sánh A=2002.2002 và B=2001.2003
Cho hình bình hành (AB > BC) Có M,N lần lượt là trung điểm của AB và CD a)Chứng minh: AC,BD,MN đồng quy b)Gọi E là giao điểm AD và MC .Chứng minh AM là đường trung bình của tam giác ECD
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến