thời Trần, ruộng đất của quý tộc, vương hầu do khai hoang mà có gọi là gì

3(2x+1)/4-5x+3/6=2x-1/3+m/12 tìm giá trị của m để phương trình vô nghiệm

Giúp mik làm bài 23=>25 nhé , mik cần gấp , cảm ơn trước.

giải phương trình 5-x/4x^2-8x + 7/8x= x-1/2x(x-2) +1/8x-16

1/ xy - 7x + y = -22 2/ xy - 3x + y = -20 3/ xy – 5y – 2x = -41

giúp mình với Bài 4: Tìm số nguyên x, biết: 1) -16 + 23 + x = - 16 2) 2x – 35 = 15 3) 3x + 17 = 12 4) (2x – 5) + 17 = 6 5) 10 – 2(4 – 3x) = -4 6) - 12 + 3(-x + 7) = -18

564-(-724)+564-224) mọi người giúp em với

Cho đường thẳng a Lấy điểm O thuộc A và M ko thuộc A vẽ tia OM .Chứng tỏ rằng mỗi điểm N của tia OM đều thuộc nửa mặt phẳng bờ a chứa điểm M.

Mọi người ơi giúp mình với Câu : đó là cách chúng ta giữ cái nhân phẩm , nhân cách giữ dòng đời biến động Là câu rút gọn hay câu đặc biệt

I. Choose the word or phrase (A, B, c, or D) that best fits the blank space in each sentence. 1. _____________is your father? - He’s very well. A. How B. What C. Where D. How well 2. How ____________is your brother? - He’s eighteen years old. A. tall B. heavy C. old D. high 3. How ___________is your mother? - She’s 60 kilos. A. weight B. heavy C. old D. tall 4. How ____________do you weigh? -1 am 45 kilos. A. heavy B. much C. weight D. weigh 5. What was _____________with her? A. matter B. problem C. wrong D. symptom 6. _______________do you feel now? - Fine. A. What B. How C. Why D. How well 7. What’s your______________? - Forty kilos. A. weight B. kilos C. height D. heavy 8. How ______________are you? - Forty five kilos. Ạ. weight B. heavy C. tall D. long 9. How _____________are you? - One meter 50 centimeters. A. height B. tall C. heavy D. long 10. We should have a ______________check-up every six months. A. medicine B. medical C. medium D. soon 11. You ______________stay at home when you are sick. A. had better B. should C. mustn’t D. AandB 12. We feel _____________ when we catch a cold. A. pleased B. pleasant C. unpleasant D. happy 11 .____________you do, your cold will last for a few days and then disappear. A. Wherever B Whenever C. Whatever D. Whoever 2 14. She has a pain ____________her back. She’d better go to see a doctor. A. on B. in C. at D. from 15. The medicines you take only relieve the______________ A. temperature B. cold C. symptoms D. cure 16. You should eat well, do exercise ______________fit and healthy. A. keep B. to keep C. to prevent D. to relieve 17. How many people __________the common cold every year? , A. feel B. catch C. take D. make \ 18. The medicines don’t cure a cold but they ____________the symptoms. A. help B. keep C. prevent D. relieve 19. The doctor gave him the ________________for his flu. A. check-up B. permit C. prescription D. help 20. Did your parents write _____________for you? A. a note sick B. a sick note C. a sick of note D. a note of sick II. Give the correct form of the word in brackets. 1. Mrs. Oanh’s daughter is having a ________________________check-up. (MEDICINE) 2. We need to know your _____________________, Minh. (WEIGH) 3. An has a toothache. It’s very _____________________. (PAIN) 4. Catching the common cold is ____________________for everybody. (PLEASE) 5. Don’t worry ! Your cold will last for a few days and then _________________. (APPEAR) 6. This map was very _______________________on our holiday. (USE) 7. What a _____________dress! Did you make it yourself? (LOVE) 8. Lam has a lot of stamps in her _____________. (COLLECT) 9. It’s very important for everyone to have a ____________ lifestyle.( HEALTHILY ) 10. Every year, thousands of people visit the ___________ beaches in Nha Trang. ( BEAUTY )