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В ТРЕУГОЛЬНИКЕ MNK,СТОРОНА MN равна x см. Выразите остольные стороны треугольника, если сторона NK в 3 раза больше стороны MN, а сторона MK на 1 см больше стороны NK.
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Предмет:
Математика -
Автор:
martin14 - 6 лет назад
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Ответы 2
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В ТРЕУГОЛЬНИКЕ MNK,СТОРОНА MN равна x см. Выразите остольные стороны треугольника, если сторона NK в 3 раза больше стороны MN, а сторона MK на 1 см больше стороны NK.Зная, что периметр треугольника равен 39,5 см составие уровнение и найдите стороны треугольника. Я не дописал а если так будет?
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Автор:
amity - 6 лет назад
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Ну вообще, если нужно просто выразить, то MN=x, NK=3x,MK=3x+1
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Автор:
zorro - 6 лет назад
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0
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Exercise I. Put am, is, are, am not, isn’t, aren’t into the gaps (пропуски).
Model: The captain is on the bridge. He isn’t on the bridge.
1. The officer of the watch _____ on the navigating bridge.2. He _____ a cadet. He _____ at the college. 3. The sailors _____ on the deck. 4. The motor-man _____ on the bow. 5. The Second Mate _____ in his cabin. 6. The deck _____ very clean. 7. I _____ a first-year student. 8. My friend and I _____ seamen. We _____ good sailors. 9. This work _____ very interesting.10. The cargo _____ in the port. 11. The cadets _____ in the class-room.12. The ship _____ in the dock. 13. I _____ the Chief Engineer. 14. You _____ from Italy. 15. You _____ 25 years old. 16. He _____ from Japan. 17. _____ she married? 18. _____ he the Captain? 19. _____ they cadets? 20. _____ you engineers?
Exercise II. Put there is / there are into the gaps.
Model: There is a book on the table.
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Exercise III. Put demonstrative pronouns this, that, these, those into the gaps.
Model: That (This) ship is new.
1. _____ sailor is on the deck, and _____ one is in the cabin. 2. _____Ships are at sea, and _____ ships are in the port. 3. _____ man is captain and _____ men are officers. 4. _____ men are good sailors. 5. _____port is big. _____ port is big too. 6. _____decks are white and clean.
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Model: There are some tall ships in the port.
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PART 2
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