đặt tính rồi tính : 756 nhân 209 , 19236 :28 , 175 nhân 367 , 7698 : 214

Làm giúp mình với . mình đg cần gấp

Dùng định lí ta lét tính độ dài AD biết DB=4,AE=3,EC=5 trong đó DE song song BC

Một viên bi có khối lượng 50g được thả lăng từ đỉnh mặt phẳng nghiêng cao 20cm, bỏ qua ma sát trên mặt phẳng nghiêng. lấy g= 10m/s. áp dụng ĐLĐN để a. tính động năng của vật ở chân mặt phẳng nghiêng b. sau khi đến chân mặt phẳng nghiêng, hòn bi tiếp tục lăn trên mặt phẳng nằm ngang thêm 1m nữa thì dừng lại. hãy tính công của lực cản và hệ số ma sát của mặt phẳng nằm ngang

Giup minh với !!!!

1 cua hang buoi sang ban duoc 70 chiec xe,so xe ban duoc tring buoi chieu gap 3 lan buoi sang.hoi buoi chieu ban duoc bao nhieu chiec xe. Giuo mh voi a

1. Facebook was built on the ………of earlier social network sites like MySpace and Bebo. A. succeed B. successful C. successfully D. success 2. It is thought that driverless cars will transform the way we move………cities in the future. A. around B. away C. along D. ahead 3. Little Pascal ……a mechanical calculator which could do additions or subtractions very quickly. A. discovered B. found C. found out D. invented 4. Robots save workers from ………dangerous tasks. A. making B. having C. performing D. carrying 5. Many people believe that robots have made workers jobless………that is not necessarily true. A. but B. and C. so D. or 6. Recent ………developments have made robots more user-friendly and intelligent. A. science B. scientist C. scientific D. scientifically 7. Teenagers spend most of their time playing computer games, ………they lost their interests in daily activities. A. moreover B. so C. however D. as a result 8. Science and technology have ………the life safe, secure and comfortable. A. transformed B. made C. done D. changed 9. Terrorists are using modern technology ………their destructive work. A. about B. at C. for D. with 10. With the advance of the science and technology, our life changes greatly in various……… A. scenes B. fields C. sights D. regions II. Put the verbs in brackets into the correct form. 1.If we (recycle) ________ more, we will help the Earth. 2. Factories (not dump) ______________waste into rivers if the government fine them heavily. 3. If people travel to work by bus, there (be) ______________fewer car fumes. 4. We (save) ________________thousands of trees if we don’t waste paper. 5. If we use water carefully, more people (have) ______________fresh water. 6. If the factory ( continue) ________________ dumping poison into the lake, all the fish and other aquatic animals will die. 7.If we recycle more, we (help) ________________ the Earth. 8. If people (travel)________________to work by bus, there will be fewer car fumes. 9. We will save thousands of trees if we (not waste)_______________ paper. 10. Factories won’t dump waste into rivers if the government ( fine) _______________ them heavily. giúp mik nhanh nhá mik cần gấp lắm

Giải hộ mk câu này với nha! Thank

Câu 3: Cho đa thức ​ P(x) = x^5 – 3x^2 + 7x^4 – 9x^3 + 6x^2 – x Q(x) = 5x^4 – x^5 + 2x^4 – 2x^3 + 3x^2 – 1 a) Thu gọn và sắp xếp các hạng tử của mỗi đa thức theo lũy thừa giảm dần của biến b) Tính P(1); Q(0) c) Tính P(x) + Q(x) và P(x) – Q(x) Mn giúp mình nhé

I. Choose the best answer: ( 3pts) 1. DRT is a (local / national / international) channel. 2. I am interested (on / at / in) the history of television. 3. A long film which is broadcast in shorts is a (cartoon / TV series / programme). 4. (How many / How much / How often) players are there in a football match? 5. This programme is interesting, (so / because / although) a lot of people watch it. 6. Find the word which has a different sound in the part underlined: A. earth B. anything C. there II. Complete the sentences, using the correct form of the words in brackets. (2pts) 1. You look quite ………………………. ( sport) 2. A person who acts in a comedy is a ……………………… ( comedy) 3. Pelé is a …………………….. hero in Brazil. ( nation) 4. VTV1 attracts millions of ……………………….. ( view) III. Supply the correct form or tense of the verbs in brackets. ( 2pt) 1. The Olympic Games …………………… held once every four years. ( be) 2. What …………….. you ………………… last weekend? ( do) 3. Pelé ………………... 1,281 goals in his career. ( score) 4. Children enjoy ………………… cartoons on VTV3. ( watch) IV. Write sentences as directed: (3pts) 1. "Laughing out Loud" / "Mr. Bean" / not / same time. (Write sentences, using the words given) - ………………………………………………………………………….. 2. Watching too much TV is not good. It hurts your eyes. (Combine this pair of sentences, using “because”) - ………………………………………………………………………….. 3. Tuan’s mother doesn’t want him to go out at night. (Rewrite this sentence) She says: “Tuan, …………………………………………………………..”