Bài 3 : Rút gọn rồi tính giá trị biểu thức : 1) A = y. ( x - y ) + x. ( x + y ) tại x = - 1 ; y =2

Giải hộ em vs ạ Cảm ơn mn nhiều

Tìm các số thực x,y thỏa mãn x^2+y^2+4=xy-2x-2y

1. I hadn't never(A) seen snow before(B) I visited(C) Canada last year(D) ( sửa lỗi sai) 2. Children_________ to be unsupervised in the museum (A): are not (B): will not (C): are not being (D): must not We ____________ go out for a walk. Do you want to join us? (A): have just been (B): are just about (C): will be about (D): will have just been A. Terry: What did you do last night? Angie: Well, I have hoped/have been hoping/had been hoping to go out, but I have/had/had had too much work B. Pete: what part of Birmingham did you live in when you were a student? Patricck: A place called Selly Oak. Do you know it? Pete: Oh yes. I was passing/used to pass/have passed through it nearly every day when I was living/have been living/have lived there

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Giúp tui vs mn ơi. Lm bài 26 và 28 ạ.Cảm ơn mn

3 mũ 1 + 5 mũ 2 = bao nhiêu mọi người

Choose the correct option A, B, C or D to complete the sentences: 1. Mai enjoys ............ to music, especially pop music in her free time. A. hearing B. playing C. listening D. talking 2. You should avoid ............. too much TV. It’s not good for your eyes. A. seeing B. looking C. glancing D. watching 3. My grandparents love ............ very much. There are a lot of beautiful flowers and fresh vegetables in their garden. A. doing garden B. to do garden C. do gardening D. doing gardening 4. Nga likes ............ with her close friend on Saturday evenings. She feels relaxing. A. window shop B. window to shop C. window shops D. window shopping 5. Minh is very hard-working boy. He doesn’t mind ............ a lot of homework in the evenings. A. making B. seeing C. doing D. reading 6. Lan used to love ............ in front of the computer for hours but now she doesn’t. She takes part in a judo club. A. having B. sitting C. using D. doing 7. Why don’t we ........... our parents with some DIY projects? I think it is useful. A. make B. help C. do D. give 8. I don’t like .......... up early in the window days. I love .......... in bed late. A. getting/stay B. get/stay C. getting/staying D. get/staying 9. Do you fancy ............ around the West Lake with me this Sunday morning? A. having B. staying C. moving D. making 10. Mai’s dad likes ........... spring rolls when her family has parties. A. making B. doing C. trying D. cooking

Mọi người vẽ giúp em theo a,b,c nha .Cảm ơn

Bài 4: Một thửa ruộng hình chữ nhật có chiều rộng là 172,8 m. Biết chiều dài hơn chiều rộng 54,4 m. Tính chu vi của thửa ruộng.