Предмет: Алгебра, автор: oksikosik

СРОЧНО!!!! 30 БАЛОВ
Доведи шо сума чотирьох послідовних натуральних чисел - парне число

Ответы

Автор ответа: sangers1959

9

Пояснення:

Нехай наймолодше натуральне число дорівнює х. ⇒

х+(х+1)+(х+2)+(х+3)=x+x+1+x+2+x+3=4x+6=2*(2x+3).

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A. Simple Present-Present Continuous

1. Many birds ______________ (fly) south in winter.

2. Ken ____________ (write) a book about the Aztec Indians. He’ll finish it soon.

3. Mandy usually _____________ (sit) with Sandra during history lessons. But today, Sandra is absent so Mandy ____________ (sit) with Beth.

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9. Our teachers ______________________(give) us a test twice a month.

10. “What _____________(you do)?” –“I _____________(taste) the soup to see if it has enough salt.”

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1. Be careful! You _____________ (hurt) yourself with that pair of scissors.

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