Tìm `x,y,z in ZZ` biết: `x^2+y^2+z^2=xy+3y+2z-3`

Bài 5: Cho góc bẹt xOy, vẽ tia Oz sao cho yoz = 50 a) Tính xOz b) Vẽ tia Om là tia phân giác của yOz, On là tia p/giác của xOz. CMR; mOn là góc vuông | Cả hình |

Tham khảo 1 số nét chữ của mọi người ? Tức là mn show chữ viết của mọi người lên thoi Vẽ mầm cute ( vẽ simple thôi ) Part 1

IV. Read the following passage and fill in the blanks with suitable words in the box. all than that into because causes either combing also due Paper can be recycled by reducing it to pulp and (1)……………….it with pulp from newly harvested wood. As the recycling process (2)……………….. the paper fibers to breakdown, each time paper is recycled its quality decreases. This means that (3)…………………a higher percentage of new fibers must be added, or the paper down cycled (4)…………………..lower quality products. Any writing or coloration of the paper must first be removed by deinking, which (5)…….removes fillers, clays, and fiber fragments. Almost (6) ……………….…….paper can be recycled today, but some types are harder to recycle …… …… (7) …… others. Papers coated with plastic or alumium foil, and papers (8)…………………..are waxed, pasted, or gummed are usually not recycled (9)………………….the process is too expensive. Gift wrap paper also cannot be recycled (10)…………………to its low quality.

Các bạn kiểm tra bài mình có làm đúng ko giúp mik với

Trong 1 bình cách nhiệt có chứa một lượng m1 ở nhiệt độ T1 = 40 độ C. Người ta thả một lượng nước đá m2 ở nhiệt độ 0 độ C vào bình .khi có cân bằng nhiệt trong bình có M = 2,5 Kg nước ở nhiệt độ T2 = 10 độ C. Tìm khối lượng m1 m2. Cho biết nhiệt nóng chảy của nước đá, nhiệt dung riêng của nước lần lượt là lamda = 336.10³ j/kg. K; C = 4200 J/kg. K ( mong Mn giúp Mik, giải chi tiết từng bước nha, Mik cảm ơn nhiều)

II. Write the correct form of each verb in brackets. 1. If you put the glasses into very hot water, they……………………(crack). 2. If Peter………………(be) late, we will wait for him. 3. No one…………………..(help) if you don’t help yourself. 4. If you boil water, it…………...……(disappear) into the atmosphere as vapor. 5. If it rains tonight, I…………………..(not go) for walk. 6. The town will flood if there …………………(be) a downpour. 7. The bear will attack you if you…………………..(provoke) it. 8. If we sit too far from the screen, I……………..(not be) able to see the film. 9. If there is an earthquake, the villagers ……………….(stay) in the shelter. 10. If we plant more trees, the air………………….(be) fresher. III. Rewrite the sentences, so that their meaning stays the same, using the beginning given for each. 1. We must leave now, or we will miss the plane.  If we don’t …………………………………………………………………… 2. Be careful or you may fall.  If you…………………………………………………………………………. 3. Hurry up or we’ll be late for the concert.  If……………………………………………………………………………… 4. Our sources of energy will soon end if we don’t try to save them.  Unless………………………………………………………………………… 5. You will catch a cold if you don’t keep your feet dry.  Unless………………………………………………………………………… 6. If she doesn’t work harder, she’ll lose her job.  Unless…………………………………………………………………………

I. Choose the best answer (A, B, C or D) to complete each of the following sentences. 1. We should use reusable water bottles………………..plastic ones. A. because B. instead of C. despite D. however 2. Walking to school will help ……………. air pollution. A. refill B. reuse C. recycle D. reduce 3. One of the bad things about…………..is that it can make fish die. A. noise pollution B. soil pollution C. water pollution D. air pollution 4. We should go to school by bike to ……………the energy. A. save B. protect C. pollute D. spray 5. Don’t forget to……………..the lights when going out! A. turn on B. turn off C. close D. shut down 6. What can we do……………….air pollution? A. reduce B. to reduce C. reducing D. to reducing 7. These three Rs …………..reduce, reuse, and recycle. A. stand up B. means C. stand for D. ask for 8. It is a good idea to……………..our clothes with our friends or cousins. A. change B. turn C. send D. swap 9. If we use……………….papers, we will save a lot of trees. A. less B. fewer C. more D. much 10. If we all use……………….bags, we’ll help the environment. A. new B. cheap C. reusable D. reduced

Giúp em câu 25 vs ạ hứa cho nhiều sao cảm mơn mọi người ạ

X x 1\ 4 + X x 1\ 5 +X x 2 = 19,2