Giải phương trình: $(x+1+\frac{1}{x}) ^{2}$ = $(x-1-\frac{1}{x}) ^{2}$

Tam giác ABC có diện tích là 27 cm vuông chiều cao AH bằng 4,5cm tính cạnh đáy của hình tam giác

I: Choose the word that has the underlined part pronounced differently from the others. 1. A. loved B. stopped C. played D. lived 2. A. laughed B. selected C. liked D. crossed 3. A. crooked B. finished C. arrived D. blessed 4. A. phoned B. enjoyed C. boiled D. cooked 5. A. followed B. fixed C. missed D. talked

Câu 4: Cho góc xOy. Trên tia Ox lấy điểm B, trên tia Oy lấy điểm C sao cho OB = 0C. Kẻ OM 1 BC (Me BC'). Tia HM cắt Oy tại F, tia KM cắt Ox tại E. Chứng minh MEF = MẸ a ) Giả sử OBC = 60°, MC = 6 cm. Tỉnh độ dài cạnh OM.

Giúp mik với mng ơi mình sắp nộp r ạ

cho ΔABC biết AB=15cm;BC=25cm.kẻ AH vuông góc với BC, BH=9cm a) tính độ dài các cạnh AH ,HC, AC b) chứng minh ΔABC vuông tại A mong anh chị giúp em với em phải nộp hôm nay rồi

Chỉ mình với ạ!!! Chỉ mình Help me

Giải dùm mình bài 5 ạ đang cần gấp lắm ạ 20 phút nữa là phải nộp rồi ạ

1. Đặt tính rồi tính:( đặt rõ ra nghen ) A) 76,24 × 4,5 B) 79,8 ÷ 12

Exercise 4: Read the passages below and answer the questions. The translate into Vietnamese: Firstly, we ought to visit our dentist twice a year. He can fill the small holes in our teeth before they destroy the teeth. He can examine our teeth to check that they are growing in the right way. Unfortunately, many people wait until they have toothache before they see a dentist. Secondly, we should brush our teeth with a toothbrush and fluoride toothpaste at least twice a day – once after breakfast and once before we go to bed. W can also use wooden toothpicks to clean between our teeth after a meal. Thirdly, we should eat food that is good for our teeth and our body such as milk, cheese, fish, brown bread, potatoes, red rice, raw vegetables and fresh fruit. Chocolate, sweets, biscuits and cakes are bad, especially when we eat them between meals. They are harmful because they stick to our teeth and cause decay. 1. How often should we visit our dentist a year? ……………………………………………………………………………….. 2. What should we brush our teeth with? ……………………………………………………………………………….. 3. What else we can use to clean between our teeth after meal? ……………………………………………………………………………….. 4. What kinds of food are good for our teeth? ……………………………………………………………………………….. 5. What kinds of food are bad for our teeth? ………………………………………………………………………………..