Помогите только ответ лёгкие балыы дана арифметическая прогрессия для которой a5= -140 - №27973662

Помогите только ответ лёгкие балыы

дана арифметическая прогрессия для которой a5= -140 a15= -250 найдите разность прогрессии
- Предмет:
  Алгебра
- Автор:
  alden
- 6 лет назад

Ответы 1

d = -250-(-140)= -110
- Автор:
  sallyak8g
- 6 лет назад
- 0
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Задание выполнить письменно в рабочих тетрадях.

1. Добавьте окончание –ing к глаголам в следующих предложениях, предложения переведите :

1. I am … tea. (drink) 2. He is … breakfast. (have) 3. I am … a letter (write) 4. They are … Spanish. (study) 5. The students are … to the lecturer. (listen) 6. John is … at his project now. (work) 7. They are … the text (translate) 8. She is … abroad (travel). 9. They are … a new grammar rule. (learn) 10. We are … the English text (read)

2. Выберите правильную форму глагола в Present Simple Tense или в Present Continuous Tense, предложения переведите :

1. The river Nile (flows/is flowing) into the Mediterranean. 2. My parents (are living/live) in Moscow. 3. He usually (stays/is staying) at the Baltimor Hotel when he is in London. 4. Don’t forget to take your umbrella. It (rains/is raining) heavily outside. 5. I (am leaving/leave). Good night. 6. My dad is a teacher, but he (doesn’t work/is not working) at the moment. 7. The boy (does/is doing) his homework now. 8. They seldom (quarrel/are quarrelling). 9. The Earth (moves/is moving) round the Sun.

3. Переведите предложения на русский язык, обратите внимание на форму глагола :

1. I am at my English lesson. I am sitting and doing my exercises. My friend is standing at the blackboard and looking at the teacher. 2. It is getting cold now. Look out. Is it raining now? 3. You are late. What were you doing? I was translating the article. 4. When I came home my parents were having supper and at the same time watching TV. 5. What was he doing when I rang up an hour ago? He was looking through a newspaper . 6. Tomorrow we shall be preparing for a test for the whole evening. 7. In July they will be taking their exams for the whole month. 8. What will you be doing tonight at 10 o’clock? Will you be working? No, I shall be reading a book at this hour.

4. Добавьте окончание –ing к глаголам в следующих предложениях, предложения переведите :

1. He is … his father (help) 2. My sister is …now. (rest). 3. The child is … now (sleep). 4. At the moment they are … to the river to swim (go) 5. The teacher is … new material to the students. (explain). 6. We are … TV program now. (watch) 7. She is … her sister to school now. (take) 8. They are … an expedition to the North (plan) 9. He is … his new method (demonstrate) 10. She is … a beautiful Russian folk song. (sing)

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