từ tứ giác nội tiếp và đường trung trực ở trong tứ giác có suy ra được đường trung trực là tia phân giác của góc thuộc đường tròn đc k mn

có gth 5 câu TN!!!!!!!!!!!!!!!!!!!

Bài 8 * : Một thửa ruộng hình chữ nhật có chu vi bằng 96 m. Nếu ta thêm chiều rộng là 7 m và bớt chiều dài là 7 m thì được thửa ruộng hình vuông. Tính diện tích thửa ruộng hình chữ nhật đó?

các bạn làm hộ mình với mình cảm ơn

mn giúp em với ạ . em cảm ơn nhiều 😽

Giải bài này bằng hệ thức vi - ét và theo các bước sau giúp mình nhé B1 : Tìm ĐK để pt có 2 ` n^o ` ` x_1 ` , ` x_2 ` Tìm ĐK để pt có 2 ` n^o ` ` x_1 ` , ` x_2 ` $\left \{ {{ a \ne 0 } \atop { Δ \geq 0 }} \right.$ B2 : Áp dụng định lí vi - ét tính được ` S ` ` = `` x_1 + x_2 ` , ` P ` ` = ` ` x_1 . x_2 ` B3 : Từ ĐK ( T ) và S tính ` x_1 ; x_2 ` theo ` m ` thế vào ` P ` để tìm thử lại ĐK

III. Give the correct form of the words in the brackets. (0,5 pt) 1. John Harison is a space ………............. who wants to destroy the Earth. (terror) 2. People’s health has been affected from bathing in or drinking ……………water. (pure) C. READING: I. Choose the best answer to complete the passage : (1,25 pt) Monica Fox is a tennis (1) ………. She started playing tennis (2) ………… she was ten years old. She has traveled to many countries with her parents and has won a lot of tournaments. She won her first (3) ………….. in a tournament in 1985. Now she is trying very (4) …………. She (5) ………….. to play at Wimbledon next year. 1: A. player B. playing C. plays D. play 2: A. why B. what C. who D. when 3: A. contest B. prize C. festival D. competition 4: A. hardly B. bad C. badly D. hard 5: A. hopes B. hoped C. hoping D. to hope II. Read the passage again and answer the questions: (0,75 pt) 1. Who is Monica Fox? ........................................................................................................................... 2. When did she win her first prize? ........................................................................................................................... 3. What does she hope next year? ...........................................................................................................................

GẠCH DẪN CHỨNG GIÚP MÌNH TỪNG CÂU NHA 40đ Family Life in the United States Family life in the United States is changing. Thirty or forty years ago, the wife was called a "housewife". She cleaned, cooked, and cared for the children. The husband earned the money for the family. He was usually out working all day. He came home tired in the evening, so he did not do much housework. And he did not see the children very much, except on weekends. These days, however, more and more women work outside the home. They cannot stay with the children all day. They, too, come home tired in the evening. They do not want to spend the evening cooking dinner and cleaning up. They do not have time to clean the house and do the laundry. So who is going to do the housework now? Who is going to take care of the children? Many families solve the problem of housework by sharing it. In these families, the husband and wife agree to do different jobs arounds the house, or they take turns doing each job. For example, the husband always cooks dinner and the wife always does the laundry. Or the wife cooks dinner on some nights and the husband cooks dinner on other nights. Then there is a question of the children. In the past, many families got help with child care from grandparents. Now families usually do not live near their relatives. The grandparents often are too far away to help in a regular way. More often, parents have to pay for child care help. The help may be a babysitter or a day-care center. The problem with this kind of help is the high cost. It is possible only for couples with jobs that pay well. Parents may get another kind of help from the companies they work for. Many companies now let people with children work part-time. That way lets parents spend more time with their children. Some husbands may even stop working for a while to stay with the children. For these men there is a new word. They are called "househusband". In the United States more and more men are becoming househusband every year. These changes in the home mean changes in the family. Fathers can learn to understand their children better, and the children can get to know their fathers better. Husbands and wives may also find changes in their marriage. They, too, may have a better understanding of each other. 1. This article is about _________. A. housewives in America B. American men as househusbands C. how more American women are working D. how family life in America is changing 2. Forty years ago, most women _________. A. had no children B. worked C. were not housewives D. were housewives 3. In those days, men _________. A. did not see their children very much B. spent a lot of time with their children C. worked with the children all day D. never saw the children 4. Today there are _________. A. more housewives B. more women working outside the home C. no jobs for women D. not as many women working 6. Day-care centers help _________. A. working parents with their children B. housewives C. with cooking and cleaning D. men become househusband 7. Some parents work part-time _________. A. so they can be with their children B. so they can earn more money C. because they have no time D. because they do not like their work Househusbands _________. A. earn a lot of money B. do not do any housework C. do the housework and take care of the children D. marry housewives 10. These changes in the American home may _________. A. not change the children at all B. not happen C. cause problems for a marriage D. help families

Bài 6 : Một bếp ăn dự trữ đủ gạo cho 125 người ăn trong 20 ngày. Nhưng thực tế có 250 người ăn. Hỏi số gạo dự trữ đó đủ ăn trong bao nhiêu ngày? ( Mức ăn của mỗi người như nhau)

hối hận, tiếc nuối, thất vọng là trường từ vựng gì ạ, mn giúp em với