Tính tổng dãy sau: |-1|+|-2|+|-3|+...+|-100|

Giải giúp mình với ạ. Giải theo cách tự luận nha. Mình đang cần gấp. Rõ ràng nha.

Part V. Read the passage and choose the correct answer A, B, C or D for each of the following questions. Write your answers on the answer sheet. A lot of children are picky eaters. For example, they don't like meat, they don’t want any vegetables, and they only want ice cream. Some people never change. Mary is a good example. She’s an adult now, but she’s still a picky eater. She says, “I only eat foods I like.” Mary loves fruit, and she eats some fruit every day, but she doesn’t eat any vegetables. “Don’t even show me lettuce or carrots!” she says. What does she like? “Pizza is my favorite food. I eat pizza at least five times a week. I have it with green peppers and onions, so I eat some vegetables!” What are her other favorite foods? She likes chocolate. She usually has some chocolate several times during the day. Does Mary plan to change her eating habits? “Not if I have a choice,” she says. “So don’t offer me any salad, OK?” 29. The best title of the passage is _________ A. Children's food. B. Picky eaters. C. Children's eating habits D. Children's favorite foods 30. According to the passage, Mary dislikes _________most. A. pizza B. vegetables C. fruit D. meat 31. Which of the following sentences is NOT correct? A. Mary only eats the food she likes. B. Mary doesn’t like vegetables. C. Mary plans to change her eating habits. D. Mary likes fruits, chocolate and pizza. 32. How does Mary feel about salad? A. She likes salad. B. She doesn't like salad. C. She loves salad. D. She thinks it's great. 33. Picky eaters are the people who _________ A. don't like meat B. don't want any vegetables C. only like ice cream D. only eat the foods they like Part VI. Rewrite each of the following sentences in such a way that it means exactly the same as the provided sentence. Write your answers on the answer sheet. 34. If someone doesn’t put the coal in, the fire will go out. -> Unless _____________________________________________________________. 35. She started working as a secretary five years ago -> She has _____________________________________________________________. 36. The storm destroyed many houses in this village last week. -> Many houses _____________________________________________________________.

(a+b)2-(a-b)2 giúp mik giải với

Cho tam giác ABC vuông tại A, đường cao AH. a) Cho biết AB = 6cm, AC = 8m. Tính độ dài các đoạn thẳng BH, CH, AH và BC. b) Cho biết AB = 6cm, BC = 10cm. Tính độ dài các đoạn thẳng BH, CH, AH và AC Giải hộ e với hứa cho tim và 5 sao

Cho hai số tự nhiên 2n+1 và 4n+3 . Chứng tỏ rằng hai số này nguyên tố cùng nhau. Mk cần gấp, ai xong trc mk cho 5 sao

Hàm số sau nghịch biến trên khoảng nào??

Calli " Thuý Vy'' Nl: Có tâm ạ:(((

phân tich đa thức thanh nhân tử x^5+x+1 HD: số hạng cần thêm bớt: x^2

Có 2 góc bù,b) có 3 cặp góc bù,c)có 4 cặp góc bù,d) có1 cặp góc kề bù