(m-2)x-3y=-5 x+my=3 (I) a.giải hpt khi m=1 b.CMR: hệ (I) có nghiệm duy nhất ,tìm nghiệm duy nhất

Làm cho mình với ,mình ra rồi mà ko chắc chắn lắm

Khi mở trường Quốc Tử Giám năm 1076 đã có những diễn biến và thay đổi như thế nào?

*Lưu ý đây ko phải đề thi mà là đề ôn hè , mong các mod để ý Ai nhanh nhất,đúng nhất sẽ đc 20đ 28-32. 𝙍𝙚𝙖𝙙 𝙩𝙝𝙚 𝙛𝙤𝙡𝙡𝙤𝙬𝙞𝙣𝙜 𝙥𝙖𝙨𝙨𝙖𝙜𝙚 𝙖𝙣𝙙 𝙢𝙖𝙧𝙠 𝙩𝙝𝙚 𝙡𝙚𝙩𝙩𝙚𝙧 𝘼, 𝘽, 𝘾 𝙤𝙧 𝘿 𝙤𝙣 𝙮𝙤𝙪𝙧 𝙖𝙣𝙨𝙬𝙚𝙧 𝙨𝙝𝙚𝙚𝙩 𝙩𝙤 𝙞𝙣𝙙𝙞𝙘𝙖𝙩𝙚 𝙩𝙝𝙚 𝙘𝙤𝙧𝙧𝙚𝙘𝙩 𝙖𝙣𝙨𝙬𝙚𝙧 𝙩𝙤 𝙚𝙖𝙘𝙝 𝙤𝙛 𝙩𝙝𝙚 𝙦𝙪𝙚𝙨𝙩𝙞𝙤𝙣𝙨. Last weekend, six students from the Donoho School went on a fascinating trip back in time. These students accompanied Jacksonville State University professor William Bannister on a fossil hunt. The students, professor, and three graduate assistants headed to a valley near Cheaha Mountain. The valley was not previously known to have any fossils in it. However, two months ago, some campers in the valley 𝙨𝙩𝙪𝙢𝙗𝙡𝙚𝙙 𝙪𝙥𝙤𝙣 some bones sticking out from the ground. When they brought them to the museum, they were told that the bones were those of a brontosaurus, a species of dinosaur. Thanks to a generous grant from the Damke Foundation, the students were able to accompany the professor on his dig. They spent most of both Saturday and Sunday carefully digging in the area. "We found a few bones," said Wendy Jacobs, a Donoho senior. "We're not sure which animal they're from, but the professor assured us they were from a dinosaur. "The students, all of whom intend to major in science at college, are looking forward to returning this coming weekend. "There's enough money in the grant for the next month, so we should get to return at least three more times." said Donoho student Philip Peters. Question 28. What would be the most appropriate headline for this article? * 1 điểm A. Dinosaur Fossils Found near Cheaha Mountain B. Donoho students meet professor bannister C. Local students go Fossil hunting D. Dinosaurs: Did they live around here? Question 29. In line 5, the phrase ‘stumbled upon’ is closest in meaning to ________. * 1 điểm A. tripped on B. accidentally found C. dug up D. conducted research on Question 30. Why does the author mention the Damke Foundation? * 1 điểm A. To claim it has an interest in dinosaurs B. To note a group that is financing the students C. To focus on its relationship with the Donoho School D. To claim that it sponsored many local digs Question 31. Who is Wendy Jacobs? * 1 điểm A. A student at Jacksonville State University B. One of professor bannister's graduate assistants C. A fourth-year student at the Donoho school A. A representative of the Damke Foundation Question 32. According to the article, when will the students go back to the dig site? * 1 điểm A. within a week B. in two months C. during summer vacation D. next autumn

Vẽ mầm zui zẻ đi NL: Vui vì sau 2 ngày off biệt tăm thì có thêm cái xác thực nữa. Rút ra kinh nghiệm, off càng lâu thì xác thực càng nhìu :))

Cho0<a<90 và sina+ cosa= căn 5/2 khi đó tana+cota bằng

Mỗi người cho mình hỏi 20,16dm3 đổi ra mol được bn vậy ạ

ở nhật bản yếu tố nào được gọi là tốt nhất là nhân tố quyết định cho sự phát triện của nền kinh tế

Lớp 6A có 45 học sinh gồm ba loại: giỏi, khá, trung bình.Trong đó 40% số học sinh loại khá.Số học sinh đạt loại giỏi bằng 4 phân5 số học sinh còn lại. a) Tính số học sinh loại trung bình của lớp 6A B)Biết số học sinh loại giỏi bằng 5 phần6 số học sinh nữ 6A tính tỉ số phần trăm giữa số học sinh nữ và tổng số học sinh của 6A

4. Choose the best question or response (A, B, C or D). 1. - 'Are these toys expensive?' A. No. B. Not at all. C. I don't think so. D. A, B or C. 2. - 'What are you doing this weekend? A. I am going for a picnic with my classmates.B. I see. hestods l C. That's a good question. D. I play football. 3. - If we turn off the lights when we don't use them, we'll save lots of electricity. A. You're right. B. I see. C. I don't know D. Not at all. 4. _?' I often use recycled things to protect the environment.' A. When do you often use recycled things? B. Where do you use recycled things? C. Why do you often use recycled things? D. How do you use recycled things? ?' "The Three Rs stands for Reduce, Reuse and Recycle. A. What is Rs about? B. What does the Three Rs stand for? reew l h C. Why do you use the Three Rs? D. Which meanings does the Three Rs indicate? 6. - 'Will robots be able to walk to school by 2030?' pons A. Certainly, they will. C. I have no idea. B. Surely, they won't. D. A, B or C.ibliud sii bas vn ld bns tevil oiwsfyesqnT. 7. ?' Yes, I could.' A. Can you speak English when you were 6 years old? u aldamude binW B. Could you speak English when you were a child? C. What could you do when you were six? 000,02 vdalied akw il A anl 1ol aliuri ziw ia D. Do you speak English ? ?' Well, I think they will play a very important role in our life.' A. What do you think of future robots? B. Where are the robots? ad oT a C. Why are the robots important? mol aelsema sng o 0 D. What might you do with these robots? 9. - 'What will you be able to do in 10 years?' Tol A. It's too difficult for me to answer now. B. I'll enter a university. C. I don't know. D. A, B or C. 10. If we plant more trees in our forest, we'll have more wood to use. A. I'm sorry. B. I see, but it's not always easy to do.