Hộ mình nha các bạn.
Help mình giải bài tập với mọi người
cho mình hỏi là tại sao góc xOz > góc xOy thì tia Oy lại nằm giữa ạ giải thích chi tiết giúp mình với xong mình vote 5 sao cảm ơn nhiều ạ giúp mình với
Giup mik 2 câu Câu 1 : Vẽ đoạn thẳng AB dài 6cm. Vẽ trung điểm M của đoạn thẳng AB và tính AM , BM .
Ai giỏi văn làm giúp em bài này với Hôm nay nộp rồi
Cộng trừ các đa thức2ײy+4x-7)+(xyz-6×2²y+5×-5
Trình bày đặc điểm của ngành công nghiệp thực phẩm ? Tại sao NCNTP được coi là ngành công nghiệp chủ đạo ở nhiều nước đang phát triển
ALL TENSES REVIEW Supermarkets ______________ (open) at 8 o’clock and _______________(close) at 9. Yesterday I _______________(buy) a T-shirt and cargo shorts. They _________________(have) dinner when the tornado________________(strike). By next summer Jayden ________________ (complete) the beginner’s computer course. I _________________(lie) on the beach in Ibiza this time next week. Lucky me! Every morning Jackson ____________ (turn) on his computer and _______________ (check) his Facebook for updates and news. Sophia and Isabella ______________(not/finish) their power point presentation on African animals yet. Tonight Evan _____________(play) a game of singles with his best friend, Christopher. This summer I _________________(read) 10 classic novels for school. Ethan and Noah _______________(already/wait) for 2 hours, when the bus finally __________(arrive). What _________________(you/do) this weekend? I think I _____________ (start) a new jigsaw puzzle. Mia looks very pale. It looks like she ________________________(faint). My cousins, Logan and Jackson, _____________________(live) in Barcelona since 2006. My Uncle Landon ________________________ (work) in Dublin from 2002-2008. My mother and father _______________________(paint) the kitchen all morning. Right now Cameron ______________________ (play) his favorite computer game. What _____________________ (you/do) at the moment? Oh, nothing. 18. This is the first time I ____________________ (ever/try) snails. 19. Fortunately Abigail _______________ just/ (put up) her umbrella when it ______________(start) to pour. Or she would have been soaked. 20. Last night my family and I __________________(watch) an interesting documentary on Ancient Greece. 21. Andrew _____________________(never/be) on a safari before and he is so excited. 22. Tomorrow morning I ____________________(see) my dentist for my yearly checkup. 23. Real Madrid _______________________________ (play) against Barcelona tonight. 24. Our school ___________________(usually/have) breaks in the morning and afternoon. 25. That girl with the red hair _______________________(talk) on the phone right now. 26. Natalie _________________________(sleep ) over Chloe’s house last Saturday night. 27. I ______________________(not/often go) to the cinema these days. _______ you ________ (go) to the cinema once a month? 28. Guess what I _________________ (wear) to the party last night? A vampire costume. 29. By next June, they _____________________________(graduate) from high school. 30. What __________________(you/do) while the ground _________________(shake) during the earthquake? 31. We ______________ (drive) on Main Street when a dog __________ (run) in front of our car. 32. Our flight _________________(leave) at 9 in the morning. 33. Bad weather ____________ (delay) our flight to Madagascar last summer. 34. School ____________(start) in September and ________________ (finish) in June. 35. Where __________________ (go) this summer? I ________________(go) on a trek in the Himalayas.
1/ cho x1+x2+x3+x4+.....+x49+x50+x51=0 và x1+x2+x3+x4=x5+x6+.....=x47+x48=x49+x50=x50+x51=1. tính x50 2/ cho a, b, c, d thuộc Z thỏa mãn a-(b+c)=d. chứng tỏ rằng a-c=-b=d ai giúp mình với mình cho câu trả lời hay nhất CẢM ƠN NHIỀU !!!
biet 30%cua mot so la 72 .Vay so do la
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