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RAL 825 2001 EXERCISE 2 Show the method to solve these problems. 1. The first number is more than the second number by 10 and the summation between the second numbers is 76. Find these 2 numbers. 2. Yongyut is three times the age of his son. In the next 14 years, his age will be double of his son's age. What age are Yongyut and his son in the present. 3. Sriya's age is four times of Paradee. In the next 4 years, Sriya's age will be double of Paradee. How old are Sriya and Paradee at present? 5. At

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* 80 he missing from those provided in Activity 6.15. Sreeting ond inviting customers Actviy 6.17 by a restaurant and looking for a good place for dinner. Listen to a conversation between the couple and a waitperson. Then answer the questions. Brad and Natalie are walking Video Brad: We are dotng fine Vattor: Good eveningl How are you doing? Natalieะ Yes, we are. (Waiter: There you go. We have very good Thai food for you here, maam. Watter: Are yoน looking for a good place for your dinner? Brad: Whoal Your food looks tasty. Waiter We hสve authentic Thai food for you to enjoy tonight. Natalieะ Yes, tt realy does. Shall we get 50 food here? Waiterr Please Come in. Brad: Absolutelyl Questions about the conversation: Answer Yes or No. ในภาษาอังกฤษ Is the couple looking for breakfast? Is the food sold by the restaurant Thai food? 3 Do the pictures of the food on the menu look delicious? 2 Does Natalie think that the food at the ความหมายว่า ที่ถูกใช้ป่อยทู่ คือคำว่า และ restaurant is g0od? Did the couple decide to have their meal at this restaurant?

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Production a) Task 1: a) Match each word with its definition. 1. emit 2. toxic 3. Combustion 4. give off a. an ilness that causes difficulties in breathing b. oil that is obtained from under the ground. C. to send out gas, heat, light, sound etc. d. involving the use of natural products and energy in a way 5. solar that does not harm the environment 6. vehicle เ7. asthma e. poisonous, or containing poison f. power that is obtained using heat and light form the sun. g. a car or bus, etc. that carries people or things form one place 8. internal เ9. petroleum 10. Sustainable to another h. the process of burning 1. inside something j. to produce a smel, Light, hear, etc. b) Complete the sentences using the words form a) 1. - is used to produce petrol, paraffin, diesel oil, etc. 2. A way to reduce air pollution is to manage and conserve the nature in (sustainable) development of forests. 3. The erupting of volcanoe the sulphur gases. 4. This building used power that is obtained from the light and heat of the sun. 5. Sulphur dioxide is a substance that injures eyes and lungs. 6. Her mother died of 7. The accidental patient had the massive 8. Traffic refers to all the..ร .that are moving along the roads. two years ago. bleeding. less carbon dioxide than coal. .of wood, coal, petrol and oil is the source of air pollution. 9. The natural gas 10. The ..

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Refer to the table, answer questions 7-9. Table: Some properties of elements at 25C and 1 atm pressure Hardness or Appearance Electricity conductivity Element Melting Boling point (C) toughness point (C) Shiny, silvery liquid Mercury Yes -39 357 Colourless gas Hydrogen No -259 -253 Iron Shiny, silvery solid Hard and tough Yes 1,538 2,861 Sulphur Yellow solid Hard and brittle No 120 445 Sodium Shiny, silvery solid Soft and tough Yes 98 883 Silicon Shiny, silvery solid Hard and brittle Slightly 1,414 3,265 Boron Black Solid Hard and brittle No 2,030 3,900 Chlorine Yellowish green gas No - 102 -35 Bromine Orange red liquid No -7 59 Oxygen Colourless gas No -219 - 183 Magnesium Shiny, silvery solid Hard and tough Yes 650 1,090 lodine Shiny, dark purple Hard and brittle No 113.5 184.5 Solid 7. Which elements are metals and which are non-metals? 8. Is silicon a metal or non-metal or metallloid? Justify your reason. 9. What are the uses of metals, non-metals and metalloids in daily life? Give examples. 0. Blement A is a solid with shiny ธurfaces, good electricity and heat conductivity, the density Or 7.8 g/cm, boiling point of 1,090 C and melting point of 650 C. Is Element A a metal or non-metal? Justify your reasons. 67

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4G ย อl 18:46 น. N ริ(78] 2. ถ้า f(x) = X + 8 เมื่อ x = -2 แล้ว 1 คะแนน f(x) มีค่าเท่าใด * ก. -4 ข. 2 O ค. 4 O ง. 6 3. ถ้า f(x) = -4(x - 1) เมื่อ x = 2 แล้ว f(x) มีค่าเท่าใด * 1 คะแนน ก. -2 O ข. -1 ค. -4 ง. -6 4. กราฟของสมการ y = -3x2 + 1 คะแนน ๆ

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Present Perfect with just, 3.2 already, (not) yet and Past Simple We use the Present Perfect to talk about actions which happened and finished in the past, but we do not know when exacly or it is not important: T have read many biographies and autobiographies. (It's not important when I did it.) Common time expressions used with the Present Perfect: ever - used in questions: Have you ever been to an art galery? * never - used in negative sentences: My grandparents have never left England. 6 since then: She won The X Factor in 2006. Since then she has sold millions of albums. already and just - used mainly in affirmative sentences: Thave already seen this film. They have just left. * yet - used in negative sentences and questions and always at the end of the sentence: Thaven't seen her yet. Has she written any songs yet? If we want to say when something happened, we use the Past Simple. We also use the Past Simple in questions with when. She won a Grammy in 2009. When did yoน see Blur play live? Complete the sentences with the Present Perfect or Past Simple form of the verbs in brackets. (you/ever/be) to the opera? (go) last month. | 1 A: B: Yes. | (see) Madama Butterfly by Puccini. (write) many crime stories. (write) her latest crime story in 2014. 2 Claire Richards She (ust/upload) some videos. (release) his new 3 Look, Pierre 4 My favourite singer single last week, but | 5 Emily (not hear) it yet. (already/buy) a birthday present for her mum. (you/do) your homework yet? (finish) an hour ago. 6 Aะ B: Yes, I

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1. Using your own simple words, how can you describe the following solutions: A. Unsaturated Solution B. Saturated Solution C. Supersaturated Solution

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1. What is matter? 2. What are the three states of matter? 3. What are the classifications of matter? 4. What is the difference between a mixture and a pure substance?

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4G แ 19:40 น. @ ป" 40 +87) แก้ไขปัญหา มัธยมต้น คณิตศาสตร์ * ให้นักเรียนเขียนแสดงการแก้อสมการเชิงเส้นตัวแปรเดียว โดยใช้สมบัติการไม่เท่ากัน พร้อมทั้งเขียนกราฟแสดงคำตอบของอุสมการเชิงเส้นตัวแปรเดียว 1) 4x >28 2) -5n 220 3) 8a <-40 Solved Close close = ภ ก (3 ()