Арифметическай прогрессия задана первыми двумя членами: а1=4,а2=9.Найдите сумму первых 10 членов этой прогрессии.

Помогите, прошу!!! 36. – Выразите вопросительные предложения косвенной речью. 1. My friend asked me: "Which book did you take?" 2. Father said to Kate: "What are you doing now?" 3. Tom said: "Have you met Pat before?" 4. Judy asked Nike: "Did you invite your friends?" 5. My aunt asked me: "Have you already finished your exams?" 6. The teacher asked his pupils: "Do you like the story?" 7. The passenger said: "What time does the plane arrive?" 8. Grandmother said to Jack: "Will you send a telegram tomorrow?" 9. She asked her guest: "Do you prefer coffee to tea?" 10. Mother asked her children: "Who has broken the cup?" 11. The child asked his father: "What is this toy made of?" 12. The doctor said to his patient: "How are you feeling now?" 13. Sam asked Jane: "Haven't I seen you somewhere before?" 14. He asked his friend: "Can I get you something to drink?" 15. John asked Chris: "When are you leaving?"

Нет ошибки в употреблении причастий в предложениях…

1. Он говорил о порядках, господствовавших здесь до революции.

2. Все, купившие три банки кофе в нашем магазине, четвертую получают бесплатно.

3. Кругом меня были улыбающиеся лица.

4. Дети, достигнувшие семилетнего возраста, должны учиться.

5х-8=4х+1 как решить  уравнение