Tứ giác TRSE có tọa độ các đỉnh như sau: T(0 ; 12) ; R(14 ; 0) ; S(0 ; -12) ; E(-14 ; 0). Tính chu vi của tứ giác đó.

XXII. Complete these sentences with “could, couldn’t” or “was, were able to”. 1. A girl fell into the river but fortunately we ________ rescue her. 2. I_______ walk when I was less than a year old. 3. My grandfather _______walk without any help last night. 4. _______ you understand what he was saying? 5. My grandmother ________ speak Spanish. 6. Suddenly all the lights went out. We ________see a thing. 7. The computer went wrong, but luckily Emma ________ put it right again. 8. There was a big party last night. You ______ hear the music half a mile away. 9. I learnt to read sheet music as a child. I ______ read it when I was five. 10. People heard warnings about the food, and they _______move out in time. 11. She wasn’t at home when I phoned but I _______ contact her at her office. 12. Mrs Carter _______ put out the fire before the house burnt down. 13. I looked everywhere for the books, but ______ find it. 14. The plane ________ take off at eleven o’clock, after the fog had lifted. 15. Jack was an excellent tennis player. He ________beat anybody.

Giúp em giải bài này em đang cần gấp

Giúp em giải bài này trước sáng mai với ạ, em cảm ơn nhiều :<

Mặt phản xạ của 2 gương phẳng hướng vào nhau và hợp với nhau một góc a. Tia tới SI song song với gương này và đi đến gương kia.Vẽ đường truyền tiếp theo của tia SI qua hệ hai gương trong các trường hợp sau: a.x=90 độ c.a=45 độ b.a=60 độ d.a=30 độ Có nhận xét gì về tia phản xạ cuối cùng đối với gương 1 trong 2 trường hợp b và d? mọi người vẽ phần d và nhận xét với ạ

8. The state laws limit the speed ______ motorists are permitted to drive. A. at which B. which C. that D. where 9. ______ today, she would get home by Friday. A. Would she leave B. Was she leaving C. Were she to leave D. If she leaves 10. He is _______ a lot of study pressure to win a place at university. A. for B. in C. with D. under 11. Shy people often find it difficult to ________ group discussions. A. take place in B. take part in C. get on with D. get in touch with 12. I live in a pleasant room _______ the garden. A. to overlook B. which overlooking C. overlooked D. overlooking 13. No one knows what the ______ of the explosion is. A. source B. cause C. reaction D. reason 14. I really can’t ______ the twins apart. They look so alike. A. say B. talk C. take D. tell 15. The _______ age of the girls in this class is sixteen. A. average B. general C. equal D. usual 16. It seems that the world record for this event is almost impossible to ______. A. meet B. break C. compare D. balance 17. My younger sister is very ______ and so she loves going out but I am much quieter and prefer to stay at home. A. enjoyable B. lively C. pleasing D. funny 18. Lomonosov was not ______ a great scientist but also a very talented poet. A. fairly B. merely C. hardly D. scarcely 19. Linda: “What an attractive hair style you have got, Mary!” - Mary: “___________.” A. Thank you very much. I am afraid B. You are telling a lie C. Thank you for your compliment D. I don't like your sayings 20. Mark: “Do you find it very interesting to travel alone?” – Nick: “___________.” A. Yes, you’re welcome B. Never mind C. No, not at all D. It’s exciting

Giải cho em bài 1 với em cảm ơn

Giúp em với ạ , em cần cấp Xin cảm ơn

Tìm số nguyên x 1/3636.(12x-91)=36 2/(19x+2.25):14=(13-64)-16 3/(x:32+45).67=8911 giúp vs ạ

giúp mình ý này voiiiiiiiiiiiii