Gúp mk với : a)x-3/x-2 - x-2/x-4 = 16/5 b)2x+1/x-1 = 5.(x-1)/x+1 c)x-1/x+1 - x²+x-2/x+1 = x+1/x-1 -x -2 d)8x²/3.(1-4x²) = 2x/6x-3 - 1+8x/4+8x e)13/(x-3).(2x+7) + 1/2x+7 = 6/x²-9

cho hình bình hành ABCD .một đường thẳng đi qua D cắt AC AB CB theo thứ tự tại M N K cmr a.DM^2=MN.MK b.(DM/DN)+(DM/DK)=1 Cứu mink vs, đánh máy sao càng cao nhé bae

Nêu suy nghĩ về câu nói của M.Go-rơ-ki : Lý do vì sao ông khuyên ta phải yêu sách

Ple ple ple Tính khối lượng và trọng lượng của quả nặng bằng sắt có thể tích 0,05m khối .Biết khối lượng riêng của sắt là 7800kg/m khối Tóm tắt nx nha

Giúp mình đây là đề thi tiếng anh ạ Đề bài là: chọn từ phát âm khác với các từ còn lại

Sự thoát hơi nước qua lá có tác dụng

đọc lá thư dưới đây và thực hiện yêu cầu dear David thank you for your letter last week .It really made me happy ;But i'm off school today because I have a toothache .I think I eat a lot of candiies and I don't brush my teeth every day .My detist often tells me that I shouldn't ear too much ice- crem and and too mary sweets .I should bursh my teeth aften meals .I 'll take hí adive .I hope I will feel better soon do write to me soon Linda A, tìm từ trái nghĩa với những từ sau 1 after = ............. better=................. b trả lời các câu hỏi 1 what's the matter with linda ? - ..................................................... 2 why does she a toothach ? -................................................. 3 what should she do ? ...................................... 4what shouldn't she do? -............................................

a) Cho 13 số hữu tỉ, trong đó tổng của 4 số bất kì nào cũng là một số dương. Hỏi tổng của 13 số đó là số dương hay số âm. b) Cho . Chứng minh: c) Cho a + b + c = a2 + b2 + c2 = 1 và

làm giúp mình chính xác, chi tiết câu này mình sẽ vote 5 sao, cho câu trả lời hay nhất làm sai, làm bừa, làm thiếu mình sẽ kiện thực hiện phép tính ( hợp lí nếu có thể ): a) -220- ( - 120 ) + ( + 130 ) + 70 b) 13 . ( 47 - 25 ) - 47 . ( 13 - 25 ) c) ( 1597 - 339 ) + ( - 1597 + 639 ) d) - ( -526 ) + ( - 350 ) + ( -150 ) + 74

II. Complete the second sentence in each pair so that it has similar meaning to the first sentence. 1. If you cook the vegetables too long, the vitamins in it will be destroyed. → Cooking__________________________________________________________ 2. They are preparing your food right now. → Your_____________________________________________________________ 3. Follow these safety instructions or you may get burnt. → If you____________________________________________________________ 4. I suggest having spaghetti and pizza tonight. → Let’s_____________________________________________________________ 5. My aunt has never tasted sushi before. → This is____________________________________________________________ 6. You need to peel the onion and slice it. → The onion_________________________________________________________ 7. Eating healthy foods is very important. → It is______________________________________________________________ 8. The rice must be cleaned before cooking. → You______________________________________________________________ 9. They think the café will be busy all year. → The______________________________________________________________ 10. It’s necessary to order the paella in advance. → The paella_____________________________________________________ III. Use the given words to write the complete sentences. 1. There/ nothing more appetizing/ smell of meat sizzling over an open fire. _________________________________________________________________ 2. Some people/ eat barbecue/ because/ it/ let/ together with friends or family/make/ feel more sociable. _________________________________________________________________ 3. People often/ barbecue/ national holidays/ special occasions/ birthday/ family gathering. _________________________________________________________________ 4. In the United States, it/ tradition/ have a barbecue/ hamburgers and hot dogs/ Independence Day, July 4th. _________________________________________________________________ 5. If you/ chance to visit/ different places/ world, you/ try/ local specialities. _________________________________________________________________ 6. There/ any good restaurants/ that town/ we/ decide/ take/ sandwiches for the trip. _________________________________________________________________ 7. We'd like/ stay longer/ try local dishes, but we/ not have/ time. _________________________________________________________________ 8. He/ learn to become/ good cook/ big restaurants and hotels/ if/ he/ try/ hard. _________________________________________________________________ 9. We/ have/ fish? This restaurant/ most famous for it/ this town. _________________________________________________________________ 10. If she/ like/ eat spicy food/ she/ add chilli. _________________________________________________________________ IV. Finish each of the following sentences so that its meaning stays the same. 1. Follow these safety instructions or you may get burnt. → If you ____________________________________________________________ 2. I suggest having some spaghetti and pizza tonight. →Why don't ______________________________________________________ 3. My aunt has never tasted sushi before. → This is ________________________________________________________ 4. Eating healthy food is very important. → It is __________________________________________________________ 5. Do more exercise or you can't lose any weight. → If ____________________________________________________________ 6. Although Jimmy was stronger of the two, his attacker soon overpowered him. → Despite his ________________________________________________________ 7. I don't intend to change my eating habits. →I have _____________________________________________________________ 8. If I follow the doctor's advice of eating diet, I can improve my health problems soon. → The sooner ________________________________________________________ 9. You need to peel the onion and slice it. →The onion __________________________________________________________ 10. The manager usually threatens not to select Brian for the team unless he trains harder. → If _________________________________________________________________