Helpppppppppppp giúp em trong 10p em cảm ơn

các lớp 7A,7B,7C thực hiện quyên góp sách cho thư viện trường, tổng số sách 3 lớp quyên góp được là 280 quyển. tính số quyển tập mỗi lớp đã quyên góp được, biết số quyển của mỗi lớp lần lượt với tỉ lệ với 7,3,4 b) tìm x,y,z biết x/3, y/4, z/5 và x+3y+2z=75

Give the correct verb forms 1. Brian had his car (repair) ………….. by a mechanic. 2. John got David (type) ……………… his paper. 3. We got our house (paint) ……………… last month. 4. Dr James is having the students (write ) ………………. a composition 5. Laura got her book (send) ………………. to the university. 6. Daniel is having his hair (cut) ………………… tomorrow. 7. Will Mrs. Ellen have the porter (carry) ………………. her luggage to her car? 8. She has had a man (fix) ……………her bike. 9. I will get Mr.Nam (explain) …………………this for me. 10. We are going to have our trip (arrange) …………………….by the travel agent.

trên thế giới có bao nhiêu nước

helpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

Complete the text with the correct past form of these verbs. ask book cost have reach smoke take off wait I am writing to complain about the summer holiday my family took with you to Crete last August. Our flight (1) Answer two hours late, and, to make matters worse, there wasn’t any food left by the time the flight stewards (2) Answer our row in the plane. We thought we (3) Answer a free transfer from the airport to the hotel, but when we came into arrivals no-one (4) Answer for us. We had to get a taxi instead and it (5) Answer fifty Euros! But there was worse to come. The previous holiday makers (6) Answer in our rooms and so they smelled very strongly of smoke. We (7) Answer for our money back, but changed our minds when the hotel manager came and talked to us. He said he was sorry we (8)Answer such a bad experience so far and arranged for us to have non-smoking rooms. He also ordered us a free meal on room service when he found out that we hadn’t eaten. I still think we should get some money back, though.

giup minh bai 1 va con b bai 2 voi a!!!

làm thế nào gửi hình ảnh trên máy tính

Giải hệ phương trình hóa $\begin{cases} 65x +56y+64z =9,25\\x+y=0,1\\0,05x -0,1y+0,05=0 \end{cases}$

Có bạn nào giúp mình giải bài 3.6 trong sách bài tập vật lí 8 ko