a) Cho tập hợp E=${0;2;4;6;8}$. Hãy chỉ ra tính chất đặc trưng cho các phần tử của tập hợp E và viết tập hợp E theo cách này. b) Cho tập hợp $P={x|x \text { là số tự nhiên và } 10 < x < 20}$. Hãy viết tập hợp P theo cách liệt kê tất cả các phần tử.

Mình đang cần gấp lắm ạ, giúp mình với!!!! Cho 48,8g hỗn hợp A gồm C2H5OH và CH3COOH tác dụng với K dư được 11,2 lít H2 (đktc) a. Viết PTPU b. Tính %m mỗi chất trong hỗn hợp A c. Cho lượng hỗn hợp A trên qua mg dung dịch KOH 5,6%. Tính mg dung dịch KOH đã dùng

What would you like for breakfast dinner

Cho nửa đường tròn tâm O đường kính AB=2R,D là một điểm tùy ý trên nửa đường tròn (D khác A và D khác B).các tiếp tuyến với nửa đường tròn (O) tại A và D cắt nhau tại C,BC cắt nửa đường tròn (O) tại điểm thứ hai là E .Kẻ DF vuông góc với AB tại F.Chứng minh a)tứ giác OACD nội tiếp b)CD ²=CE.CB

Giải hộ em ....................

ĐỀ CƯƠNG THI NÓI HỌC KÌ II– LỚP 8 Năm học: 2020 – 2021 1. Put the verbs in brackets into the correct form. 1. If I were you, I (look) ________________ for a new place to live. 2. If Lan wasn’t ill, she ( join) ________________ out tree planting activity. 3.If there were fewer cars on the road, there (be) ________________ less pollution. 2. Give the correct form of the verbs 1.If people really cared about the environment, they ( not dump ) ________________ waste into the lake. 2.If there was no fresh water in the world, what (happen) ________________. 3.If you (be) ________________ the president, what would you do to help the environment? 3. Put the verbs in brackets into the correct form 7.They get sick so often. If they exercised more, they (be) ________________ heathier. 8.If I (have) ____________ one million US dollars , I would build more parks in our city. 9.Quan’s mother is unhappy. If Quan tided his room every day, his mother (not be) __________so upset. . 3.If you study harder, you (pass) ________________ the exam. 5. Write a conditional sentence type 2 for each situation. 1.People throw rubbish in the street.The street doesn’t look attractive. If ………………………………………………………………………. 2.There are so many billboards in our city. People can not enjoy the view. If ……………………………………………………………………………………… 6. Write a conditional sentence type 2 for each situation. 1.There is so much light in the cityat night.We can not see the stars clearly. If ………………………………………………………………………………………… 2.We turn on the heater all the time. We have to pay three million dong for electricity a month. If ……………………………………………………………………………………… 7. Give the correct form of the verbs 1. We’ll go to the beach tomorrow if it ( be) ________________ nice. 2. I (watch) ________________ a science fiction film on TV at 9 .00 tonight. 3. We’ll need (call) ________________ him more often 8. Rewrite the sentences in report speech. 1. ‘I have been given a new laptop.’ Michael told me that …… 2. ‘I’m leaving Viet Nam tomorrow’ Olive told Chau that ……… 9. Change these statements into reported speech. 1. “I want my room to look nice at the festival” Hoa said. ->……………………………………………………………..………………………….. 2. “I will clean all the class windows tomorrow” said Trung. ->…………………………………………………………………………………..…… 10. Rewrite the following sentences use passive voice. 1. The brave firefighter rescued him out of the fire. →.................................................................................................................................... 2. The earthquake has destroyed a big number of buildings in the city. →.................................................................................................................................... 11. Rewrite the sentences in report speech. 1. ‘I didn’t say anything at the meeting last week.’ He said that………………………………………………………………………………… 2. “I’m cleaning our house.” Loan said to Lan ->…………………………………………………………………………………………. 12. Complete the sentences with the correct forms of the verb in the brackets. 1. Do you enjoy (write) letters to your friends? 2. He has decided (install) the Internet to look for information more easily. 3. She intends (participate) in the program called "The survivor” to experience the life in an isolated island. 13. Give the correct form of the verbs 7. Our teacher didn't mind (explain) the exercise until we understood it yesterday. 8. Peter denied (steal) that mobile phone. 9. My mother wants me (post) this letter before afternoon. 14. Give the correct form of the verbs 1. They (not start) ……………….the project yet. 2. My brother hates (do) ………………the same things day after day. 3. My brother usually (go) …………………fishing in his free time. 15. Rewrite the following sentences use passive voice. . 1. The storm destroyed many houses in this village last week. -->Many houses……………………………………………………………………...……….. 2. People donated a lot of clothes, food and drinks to support the victims of the flood. → A lot of........................................................................................................................... 16. Give the correct form of the verbs 1. This house ( build) _______________in 2015. 2.Most people (leave) _____________before the volcano erupted. 3. By the time we arrived at the canyon , it (stop) _______________ snowing. 17. Give the correct form of the verbs 1. After Nick (do) his homework, he (go) to bed last night. 2. Mai (live) in HaiPhong for five years before she (move) to Ha Noi three years ago.

Trả lời giúp mik mấy câu này đi! Dễ lắm!! 1) ( $2x^{2}$ +x +1) ($2x^{2}$ +x+4)= -4 2) $4x^{3}$ -$4x^{2}$ -15x+18 =0 3) $x^{4}$ +$2x^{3}$ -$4x^{2}$ -5x-6=0 4) $x^{4}$ -$5x^{3}$ +$7x^{2}$ -5x+1=0 5) $(x+2)^{4}$ +$(x+4)^{4}$ =16 Làm ơn!!!! Hứa tặng 5*!!!

Tìm các số nguyên x,y sao cho 2014^||x^2-y|-8|+y^2-1=1

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Lúc 7 giờ, một người đi xe máy từ A-> B và ô tô đi từ B->A; cả hai xe cùng khởi hành một lúc và đến 9 giờ 30 phút thì hai xe gặp nhau. Biết lúc gặp nhau thì xe máy đã đi được quãng đường là 115 km và vận tốc ô tô gấp 1,5 lần xe máy. Tính quãng đường AB. Mọi người giúp em vs ạ