viết bài phát biểu về cảm xúc ngày khai giảng ở năm học cuối cấp cho năm học này. mn giúp mik với ạ

Giúp mình với!!!! CMR:Các đa thức sau luôn dương với mọi x,y a)$-x^{2}$+6x-15 b)$-9x^{2}$+24x-18 c)(x-3)(1-x)-2

cho Om là tia phân giác của xOy,tia On là tia đối của Om,biết nOx=100 độ a)Tính số đo các góc xOm,mOy,nOy b)chỉ ra các cặp góc bằng nhau.Các góc đó có đối đỉnh ko.Vì sao?

Giúp mình lập bảng biến thiên và CHỈ mình CÁCH ĐẠO HÀM nhé.

Hãy xác định số mol của H2SO4 có trong 500g dung dịch H2SO4 9,5%

Giới thiệu về người bàn thân của mik bằng tiếng anh Mong mọi người giúp đỡ

Khi đặt vào hai đầu của một dây dẫn một hiệu điện thế 18V thì cường độ dòng điện chạy qua nó là 2,5A. Hỏi nếu cho hiệu điện thế tăng thêm 3,6V nữa thì cường độ dòng điện chạy qua nó là bao nhiêu? Ps: các bn nhớ tóm tắt nha

VI. Write the correct form or tense of the verbs in brackets. 1. By the time Alex finished his studies, he (be) in London for over eight years. 2. At the moment the population of the world (grow) at an increasing rate. 3. It (claim) that some doctors were working 80 hours a week. 4. My mother suggested I (throw) away some of the stuff in my closet. 5. While we (do) the maths test, the fire alarm (go) off. VII. Read the text carefully then decide whether the statements are true (T) or false (F). Spending your free time on the Internet can be fun. You can chat, share photos with friends, and play online games. But some people are addicted to the Internet. They just can’t turn it off. Being online for many hours at a time does not mean you have a problem. The Internet is very useful. Online, you can pay your bills, buy clothes, and read the news. There are many good reasons to spend time online. However, people with an Internet addiction are online too much. They don’t spend time with their friends and family. Instead, they spend their time chatting with their Internet friends, people they have never met in real life. Some also play online games all day or night. Some people with Internet addictions even leave their jobs so they can spend even more time online! People with Internet addictions don’t just go online to shop, have fun, or do work. People who have this problem often go online because they want to escape the stress and problems in their lives. Many internet addicts stop caring about their real lives, and focus only on their online lives. One way Internet addicts can get help is by using special software. This software controls how much time someone can spend online. It tells the computer to turn off the internet after a certain amount time. This helps people focus on real life. The software’s goal is to teach people to use the Internet for good reasons and not just as an escape. 1. People with Internet addiction spend most of their free time on the Internet. 2. Paying bills online is a useful way to use the Internet. 3. Internet addiction causes problems in one’s daily life. 4. Most Internet addicts play online games all day or night. 5. Using special software is a way of helping people stop their Internet addiction.

Calli:Yuu Ngốc NL:Em là tvm a/c lướt qua một tí chào em phát >:v

CÁC BẠN KT XEM MK LM ĐÚNG KO Ạ a) 1. example 2. Paul says to Jenny he is waiting for her 3.I say to you i am waiting for you 4. you say to me you are waiting for me 5. Janes says to the boys he is waiting for them b) 1. They said to us they bought us some books the day before 2. Sarah said to the children she bought them some book the day before 3. Mary says to peter she bought him some books the day before 4. You said to me you bought me some books the day before 5. I said to you i bought you some books the day before -----\ Sally says to Rob let he help her. 2. Mrs gibson asks Dave whose he wear hat . 3. The politicant says they win the election that month. 4. I say to Ben if he drink my … 5. I say to Ben where he founds these cats. 6. Mrs Taylor says to the teacher her students are really … 7. Mr gibson says to Dave not enter her room 8. Mr gibson says to their children if they are hungry