mn giúp e vs ạ Rút gọn các biểu thức

câu 1; a) -11/14 +4/7 +1/2 b) -8/20+ 0,9 .(1/3- 1/5) :20% câu 2: a) 1/3+1/3:x=-1/5 b) x-1/3.x=2 1/3 (hỗn số)

4. Question the word with an asterisk. a. John is writing *a letter*. ________________________________________________________________ b. *She* walks home from school. ________________________________________________________________ c. The children are sitting *in the garden*. ________________________________________________________________ d. Peter runs with his dog *on Sundays*. ________________________________________________________________ e. My rabbit has *a cage* in the garden. ________________________________________________________________ f. They go to work *by bus*. ________________________________________________________________ g. David likes cats *because they are nice*. ________________________________________________________________ h. *Jenny* isn't sleeping late today. ________________________________________________________________ i. We are going *to the cinema*. ________________________________________________________________ j. I'm leaving *now*. ________________________________________________________________ k. Kim and Tina are playing *ball* in the garden. ________________________________________________________________ l. They are running *home*. ________________________________________________________________ m. *Mr Johnson* has been living in Montreal for ten years. _____________________________________________________________________ n. Anne likes her new job *very much*. _____________________________________________________________________ o. The Barnes are planning a trip *to Norway*. _____________________________________________________________________ giúp mình với mn, cảm ơn (các bạn làm đc đến câu nào thì làm nha)

M.n hướng dẫn em làm bài này với ạ.

what .......there (be) around your house?

cho tam giác vuông cân tại A M là điểm nằm trong tam giác sao cho MA:MB:MC=2:3:1 tính góc AMC

I. Give the correct form of the word given to complete the sentence. 1. Is she enough to run one kilometer? (GOOD) 2. “Ow! Be careful with that coffee.” - “Look, now I have a on my arm” (BURNING) 3. Rob has a of 39.50C (TEMPERATE) 4. Don’t eat so quickly. You’ll get a ___ (TEETH) 5. I have a in my back. I’m going to lie down. (PAINFUL) 6. That’s a bad . Why don’t you have a glass of water? (COUGHING) 7. “I have .” - “Why don’t you telephone the doctor?” (STOMACH) 8. My arm after the table tennis match (HURT) 9. “I have a .” - “That’s because you watch too much TV.” (HEAD) 10. Lan was absent from class because of her ______ (SICK) 11. I have an ________- with my doctor at 5 p.m. (APPOINT) 12. She is still receiving a __________treatment in a hospital. (MEDICINE) 13. People fell _________when they catch a common cold. (PLEASE) 14. She’s_____ to seafood. So when she eats them, she will have stomachache problems. (ALLERGY) 15. You should choose foods and drinks________ to prevent some dangerous diseases. (CARE) 16. He continues_______ because he is catching a flu. (SNEEZE) 17. He can reduce his serious_____ when he relaxes in time and does exercise regularly. (DEPRESS) 18. If you provide yourself with enough vitamins, you will make a better______ on your work or study. (CONCENTRATE) 19. I got ______________ during my beach vacation. (SUNBURN) 20. Lack of vitamin E can cause skin diseases and __________. (TIRED)

Giúp tớ bài này với ah, các cậu ơi tớ sẽ cho 5*

tìm x biết: 1/5 + 4/5 x X = 7/3

Thổi luồng khí H2 dư đi vào các ống sứ mắc nối tiếp chứa các bột rắn đc nung nóng tương ứng sau: ống 1 có 0.1 mol CuO ống 2 có 0.2 mol Al2O3 ống 3 có 0.2mol Fe2O3 ống 4 có 0.15mol MgO a, tính tổng V H2 cần dùng sau khi kết thúc phản ứng b, tính khối lượng chất rắn còn lại trong mỗi ống sứ