Bài 1. Một mảnh đất hình chữ nhật có chu vi là 160 m, chiều dài hơn chiều rộng 20 m. Tính diện tích mảnh đất đó. Bài 2. Một người đi xe đạp trong 3 giờ, giờ thứ nhất đi được 15 km, giờ thứ hai đi được 19 km, giờ thứ ba đi được quãng đường bằng nửa đường đi trong hai giờ đầu. Hỏi trung bình mỗi giờ người đó đi được bao nhiêu km? Bài 3: Hai người cùng mua một loại gạo. Người thứ nhất mua 15 kg phải trả 232 500 đồng. Người thứ hai phải trả 77 500 đồng. Hỏi người thứ hai mua bao nhiêu kg gạo? Bài 4: Lúc 7 giờ 30 phút ngày chủ nhật, bác An đi xe máy từ thành phố về quê và ở lại quê 5 giờ rồi đi xe máy về thành phố. Bác An về thành phố lúc 16 giờ 30 phút. Quãng đường từ thành phố đến quê bác An dài 57 km. Hỏi bác An đi xe máy với vận tốc là bao nhiêu?

Câu ở trên ak mọi người giúp em

Cho M là trung điểm của AB. Trên cùng một nửa mặt phẳng bờ AB kẻ Ax, By vuông góc AB. Lấy C, D thuộc By, Ax sao cho MC vuông góc MD. Gọi DM cắt tia đối tia BC tại E. Chứng minh: a) M là trung điểm của DE b) Tam giác CDE cân c) AD+ BC= CD.

Question 26: Choose the correct option A, B, C, or D for each gap to complete the following passage. When you are in Hong Kong, you can go about by taxi, by tram, by bus, or (1) ________ underground. I myself prefer the underground because it is fast, easy and cheap. There are (2) _________ trams and buses in Hong Kong, and one cannot drive along the road quickly and without many stops. The underground is therefore usually quicker (3) _______ taxis or buses. If you do not know Hong Kong very well, it is very difficult (4) _______ the bus you want. You can take a taxi, but it is (5) _______ expensive than the underground or a bus. On the underground you find good maps that tell you the names of the stations and show you how to get to them, so that it is easy to find your way. Number 5. too much more as Question 27: Choose the correct option A, B, C, or D for each gap to complete the following passage. When you are in Hong Kong, you can go about by taxi, by tram, by bus, or (1) ________ underground. I myself prefer the underground because it is fast, easy and cheap. There are (2) _________ trams and buses in Hong Kong, and one cannot drive along the road quickly and without many stops. The underground is therefore usually quicker (3) _______ taxis or buses. If you do not know Hong Kong very well, it is very difficult (4) _______ the bus you want. You can take a taxi, but it is (5) _______ expensive than the underground or a bus. On the underground you find good maps that tell you the names of the stations and show you how to get to them, so that it is easy to find your way. Number 1. by on in with Question 28: Read the text and choose the correct answer A, B, C, or D for each of the questions. In Britain, the climate is not very good. There are very few hot days, and it rains a lot. Because of this, people spend a lot of time at home. Generally, British homes have a lot of furniture in them, carpets on the floors and heavy curtains. Many houses in Britain are old. Many of them are over one hundred years old. Often, they do not have enough insulation and the heat goes out through the windows, the doors and up the chimney. Because of the climate, people in Britain have to spend a lot of money on heating. Many houses have a special system called "central heating". This heats all the rooms and, at the same time, heats the hot water. Houses without central heating often have gas, electric or coal fires. The rooms in most British houses are quite small. New houses are much better. They have two layers of glass in the windows to stop the heat going out. Why do British people spend a lot of time at home? Because they don't know where to go. Because the climate is very good. Because the climate is not very good. Because they want to stay at home. Question 29: Read the text and choose the correct answer A, B, C, or D for each of the questions. In Britain, the climate is not very good. There are very few hot days, and it rains a lot. Because of this, people spend a lot of time at home. Generally, British homes have a lot of furniture in them, carpets on the floors and heavy curtains. Many houses in Britain are old. Many of them are over one hundred years old. Often, they do not have enough insulation and the heat goes out through the windows, the doors and up the chimney. Because of the climate, people in Britain have to spend a lot of money on heating. Many houses have a special system called "central heating". This heats all the rooms and, at the same time, heats the hot water. Houses without central heating often have gas, electric or coal fires. The rooms in most British houses are quite small. New houses are much better. They have two layers of glass in the windows to stop the heat going out. New houses usually have _________ in the windows to stop the heat going out. three layers of glass one layer of glass two layers of glasstwo or three layers of glass

Vẽ anime đeo kính tròn gọng trắng, full màu NL: cacban đến từ tỉnh/thành phố nào thế ?________?

giúp em với ạ!!!!!!!!!!!!!!!!!!!!!!!

Tính diện tích hình thang ABCD . Có đường cao BH=15cm, hai đường chéo AC và BD vuông góc với nhau và BD = 15cm(vẽ hình với ạ)

giúp mình với,gửi lúc nào cũng đc miễn là làm hết bài 4,6,7 ,minh vote hay nhất ,đánh giá 5sao. cám ơn bạn bài giúp mình rất nhiều

Viết mở bài phân tích nhân vật Vũ Nương (theo kiểu gián tiếp) trong tác phẩm Chuyện người con gái Nam Xương của Nguyễn Dữ

gúp e với ạ!!!!!!!!!!!!!!!!!!!!!!