Câu 6. Một khu đất hình chữ nhật có chiều dài 150 m, chiều rộng bằng 25% chiều dài. Tính diện tích khu đất đó. Người ta trồng rau trên khu đất đó, tính ra trung bình cứ 100 m2 thì thu hoạch được 80 kg rau. Hỏi trên cả khu đất đó người ta thu được bao nhiêu tấn rau?

Tìm x,y biết $\frac{1 + 3y}{12}$ = $\frac{1 + 5y}{5x}$ = $\frac{1 + 7y}{4x}$

Các bạn giúp mk 5 câu này nhaa. Cảm ơn trước ạ

Trong không gian Oxyz, cho ba điểm a(0;3;-1),b(2;4;0),c(0;1;0) . Mặt phẳng (ABC) có phương trình là

tìm tất cả các số phức thỏa mãn |z-1+2i|<=1

Viết tỉ số sau đây thành tỉ số của hai số nguyên (rút gọn nếu có thể). 3 và 1/7:(12và 4/7)

The people below all want to go on holiday. There are descriptions of eight holidays. Decide which holiday would be the most suitable for the following people. For 1-5 write the correct letter A-H. 1 George wants a holiday with a big group of friends. They are into sports and want to do different things every day. He doesn’t like boats, and some in the group have young children. 2 Ana loves to be near the sea. She wants to visit different places, but she also wants to keep away from holiday resorts. She enjoys being active and learning new skills. 3 Harry just wants to relax and have fun by the sea. He loves going out and wants to meet other people. He wants a cheap hotel and would prefer to pay for everything together. 4 Jess wants to travel abroad and learn about a different way of life. She wants to stay with local people, not in hotels. She would also like to see some performances. 5 Greg doesn’t like crowded beaches and wants a peaceful holiday where there aren’t many people. He enjoys walking in the countryside and is happy to spend some time alone with a good book. THE BEST HOLIDAYS A. Golden Sands Beach Club There’s lots to do at the Golden Sands Beach Club in Mallorca. It’s a holiday you can afford. Enjoy wonderful beaches and swimming in the Mediterranean or take trips to nearby villages! Then enjoy shows and make friends at the social activities in the evening. All meals and drinks are included in the price! B. Making waves Our learn-to-sail holiday in Greece will teach you all the basics of sailing. You’ll be busy but will still have time to enjoy the silence of the open sea. We stop at a small harbour every night where you can enjoy local food in small restaurants, before sleeping on your boat. Price includes accommodation but not food. C. Forest Camp Get away from it all at Welldale Forest. Stay on a local working farm or in cabins in the forest. Join in farm life or explore the many paths through the forest with our friendly guides. For those who prefer to relax, you can just enjoy time on your own listening to the sounds of the forest. D. Culture shock Get away from the usual tourist destinations and visit India. On this tour, you’ll visit seven cities, see the famous Taj Mahal and enjoy time at a beach resort. You’ll stay with families and experience daily life with them. A full programme of cultural events includes some amazing dance shows! E. Seaview Hotel Enjoy a week at this wonderful, small, luxury hotel in Spain. The price includes all food and drinks, and the facilities include a swimming pool, tennis courts and a restaurant. We organise trips to plays and concerts in the evenings. There’s also a beach where you can sit quietly and relax or read! F. Hotel on the sea Enjoy two weeks of luxury on this cruise around the Mediterranean visiting seven popular destinations. Relax in the sunshine by the ship’s swimming pool. You won’t get bored as there are cinemas, tennis courts and a theatre on board, plus plenty of social activities in the evening. G. Active fun Looking for an active holiday? This wonderful busy holiday resort offers tennis, swimming, golf and lots more.There’s something for everyone. Lessons are available so you can learn something new, whether you’re 5 years old or 55! Fun for all the family! Price includes accommodation and breakfast. H. On foot Do you love walking? Try this walking tour in the mountains of Italy. Each day, you will walk with an experienced guide as part of a group of walkers, then spend the night as guests of local people. It’s a great way to see some beautiful countryside and make new friends.

Giúp em bài này với ah Em cânf gấp Em cảm ơn

P=(x√x-3)/(x-2√x-3)-2(√x-3)/(√x+1)+(√x+3)/(3-√x) Tìm giá trị của P với x=14-6√5

Cho đường trond tâm O bán kính R .Qua điểm M ở ngoài hình tròn vẽ 2 tiếp tuyến MA,MB đến đường tròn (A,B là các tiếp điểm) kẻ đkinh AC của đường tròn tâm O A)CM:OM vuông góc vs AB , từ đó cm OM song song BC