Cho góc bẹt xOy. Vẽ tia Oz thỏa mãn zOy- 2/3zOx. gọi Om và On lần lượt là các tia phân giác của zOx;zOY a) Tính zOx; zOy b) zOm; zOn có phụ nhau không? Vì sao

Ex3: Write conditional sentences type 2, using the cues given. 1. If/ we/ destroy/ the ozone layer/ what/ save/ us/ the UV rays? 2. If/ people/ not really care/ the environment/ they/ not try/ save it. 3. The river/ not be/ so polluted/ if/ factories/ not dump/ waste/ it. 4. We/ be/ less worried/ if/ oil spills/ not have/ such destructive effects. Ex4: Complete the sentences with the correct form of the verbs in brackets. (Dùng dạng đúng của ĐT trong ngoặc: theo công thức câu ĐK 1 hoặc 2) 1. If we_____ (not recycle) paper now, we’ll need to cut down more trees in the future. 2. If the local people_____ (have) fresh water, they wouldn’t have to use polluted water. 3. What________ (happen) if radioactive material was not handled properly? 4. If we recycle more household waste, there____ (be) less damage to the environment. 5. If we________ (not understand) environmental problems, we would not be able to do anything about them. 6. If the polar ice-caps melted completely, Sea levels worldwide_ (rise) about 60 metres. 7. The amount of plastic in the ocean________ (increase) if we________ (not take) action now. 8. These fish_____ (not die) if the factory ____ (not dump) its toxic waste into the river. 9. There ________ (not be) enough oxygen if we ________ (not protect) the rainforests. 10. If I ________ (be) the President, I ________ (ban) billboards in cities in order to reduce visual pollution.

tại sao máy mở được tuyensinh247 lúc thì ko mở được vậy ai có cách ko ? ko spam

Ex1. Give the correct form of these verbs. 1.If you (come)……here in Sping, You will have a chance to go to the village fair. 2. If I see him, I (give)………him a gift. 3. If Hoa ( finish)………the dress before Saturday, she’ll give it to you. 4. The child will die if nobody (send)……him for a doctor. 5. If you (go)……away, please write to me. 6. If it (not rain)………,I will go to the movies. Ex2. Complete the sentences with the verbs in brackets. Use conditional sentences type 1. 1. If the air in a city________ (get) very polluted, it can make people’s eyes burn. 2. If we dump all sorts of Chemicals into rivers, we________ (not be) able to swim in them in the future. 3. Many wildlife habitats will be destroyed if people________ (keep) polluting the environment. 4. If we all use public transport more, we________ (help) reduce air pollution. 5. If we________ (not stop) over-fishing the oceans, many species________ (become) extinct. 6. If everyone________ (recycle) paper, metal and glass, we ________ (not produce) so much rubbish. 7. We________ (have) dirty seafood if we________ (dump) rubbish into the sea. 8. If global warming________ (continue), temperatures________ (rise) even higher. 9. If light pollution________ (keep) growing, you________ (not be) able to see even the Big Dipper at night. 10. We________ (threaten) our own existence if we________ (not cut down) the waste rapidly.

Bài 7.15 Cho tứ giác lồi ABCD có AB vuông góc với CD và AB = 2, BC = 13, CD = 8, DA = 5. Tính diện tích tứ giác ABCD. Giúp em giải bài này

Choose the correct option for each of the following sentences 1. What is the ____________ month of the year in Việt Nam ( hot ,hotter,hottest) Giải tiếp ở dưới ảnh ạ . Thanks 😘

86. Who looked after the children when you were away? => .................................................................................................................................................. 87. They used to drink beer for breakfast in England years ago. => ............................................................................................................................ 88. People say that the price of gold is going up. => .................................................................................................................................................. 89. They never made us do anything we didn't want to do We ....................................................................................................................................... 90. They made him wait for two hours. He was ................................................................................................................................ 91. Computers are used to design new models. ( People .................................................................................................................................. 92.They have decorated their house recently. ( Their house.................................................................................................................... 93. When he is asked about his past, he hates it. - He hates...................................................................................................................... 94. I remember them taking me to a well-known theatre in the city. - I remember...................................................................................................................

Giúp mình với!!!! CMR: a)2(a³+b³+c³-3abc)=(a+b+c)[(a-b)²+(b-c)²+(c-a)²] b)(a+b)(b+c)(c+a)+4abc=c(a+b)²+a(b+c)²+b(a+c)²

Ai có thể giải hộ e câu này dc ko ak.E cảm ơn trc ak😈❤️

Cho góc bẹt xOy. Vẽ tia Oz sao cho góc xOz=70 a) Tính góc zOy? b) Trên nửa mặt phẳng bờ chứa tia Oz vẽ tia Ot sao cho góc xOt bằng 140. Chứng tỏ tia Oz là tia phân giác của góc xOt c) Vẽ tia Om là tia đối của tia Oz. Tính góc yOm