chứng minh -a.(c-d)-d.(a+c)=-c.(a+d)

Các bạn giúp mình giải nha mình gấp lắm r I. Re-arrange the words to make meaningful sentences. 1. This / is / as / film / good / as / one. / that / not ______________________________________________________________ 2. They / books / donated / street / clothes / and / children. / for / last week ______________________________________________________________ 3. like / I / going / the / art / to / gallery. __________________________________________________________ 4. opened / my / in / school. / can / A / be / new / library __________________________________________________________________ 5. you / Have / finished / yet? / paintings / the ______________________________________________________________ II. Complete the second sentence so that it means the same as the sentence before. 1. Her taste is not different from mine. => Her taste is ___________________________________________________ 2. I began studying English three years ago. => I have _______________________________________________________ 3. I find carving eggshells interesting. => I enjoy _______________________________________________________ 4. Get up early or you’ll go to school late. => If you don’t get _________________________________________________ 5. They can buy many kinds of goods in Ben Thanh Market. => Many kinds of goods__________________________________________________ III. Use the words given to make some sentences. 1. Tom / often play / monopoly / his friends. _________________________________________________________ 2. We / should / eat / more / fruits / vegetables. ___________________________________________________________ 3. I / start / play football / when / I / ten years old ___________________________________________________________ 4. In / past, / this house / build / by / my uncle. __________________________________________________________ 5. Read / books / free time / be / my / favorite / hobby. ______________________________________________________________ ____________ THE END_______________

(London) (wich) lies on (the) river thames (is) the capital of england Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Chuyên gia văn ơi với các bạn giỏi văn đội tuyển văn ơi giúp mk với ạ !!

Có ai biết làm câu 4 5 hong giúp mình với

Rewrite the without changing the meaning 1 I spend 15 minutes walking from hear to my school → It ... 2 My house is not far from your house → It...... 3 You can come here by bus → You..... 4 My house is about 30 km from Natiomal Library → It.... 5 What is distance between the board and the first student 's desk? → How..... 6 Is the movie theater far from the restaurant? → It.....

cho tam giác ABC vuông cân tại A, D là điểm bất kỳ trên cạnh AB, trên nửa mặt phẳng bờ AB có chứa điểm C vẽ tia Bx sao cho góc ABx = 135 độ.Đường thẳng vuông góc với DC kẻ từ D cắt tia Bx tại E. Chứng minh Tam giác DEC vuông cân

Các bạn ơi giúp mik vs mik đang cần gấp

A. Read the passage below and fill in each blank with one suitable word. There is ONE EXTRA word. social from download cartoon but blogs Teenagers nowadays like using the Internet. Some of them like writing blogs. On these (1) .......... they can write about their hobbies, their everyday lives, their special experiences, etc. Other teenagers love joining (2) ............. networking sites. They can create their profiles to interact with others. Some like using their real names (3) .............. others prefer choosing new names as their usernames. With those sites, they can express their ideas about other users' new posts, new pictures, or follow famous people that they like. Teenagers also (4) ....................... programs on their computers or smartphones. With these kinds of programs, they can do a lot of things such as learning languages or playing games. Life for teenagers today is very different (5) ...................... what it was like for their parents. B. Read the passage then choose the correct option Today, supermarkets are found in almost every large city in the world. But the first supermarket (6)______opened only fifty years ago. It was opened in New York by a man named Michael Cullen. A supermarket is different (7)________other types of stores in several ways. In supermarkets, goods are placed on open shelves. The (8)______ choose what they want and take them to the checkout counter. This means that fewer shop assistants are needed than in other stores. The way products are displayed is another difference between supermarkets and many other types of stores; (9)______ example, in supermarkets, there is usually a display of small inexpensive items just in front of the checkout counter: candies, chocolates, magazines, cheap foods and so on. Most customers (10)________go to a supermarket buy goods from a shopping list. They know exactly what they need to buy. They do the shopping according to a plan. 6. A. is B. has been C. was D. were 7. A. in B. from C. of D. with 8. A. customers B. managers C. assistants D. sellers 9. A. in B. for C. of D. by 10. A. who B. what C. which D. whom

Cho 26,6 g hỗn hợp KCI và NaCl hoà tan vào nước để được 50 g dung dịch. Cho dung dịch trên tác dụng vừa đủ với AgNO3 thì được 57,4 g kết tủa a) Tính % khối lượng các muối có trong hỗn hợp đầu. b) Tính C% của dung dịch muối.