Предмет: Математика, автор: lv229455

Помогите решить:
Периметр прямокутника 20 см,ширина-3 см. Накреслити Цей прямокутник.

Аноним: ширину найти?

Ответы

Автор ответа: homenkooi

1

Ответ:

довжина 7

Пошаговое объяснение:

P=a+a+b+b

20=2a+3+3

20=2a+6

-2a=6-20

-2a=-14

2a=14

a=7

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Українська мова, автор: SonyMillerman290

Визначити усі члени речення
Мрія написати шедевр нарешті перетворилася у реальність.

2 года назад

Предмет: Окружающий мир, автор: a114051

Куда впадает река Вычегда?дам 42 балла

2 года назад

Предмет: Українська мова, автор: vicky20060000

Речення із словами різні і радісні ( закінчення змінювати можна)

2 года назад

Предмет: Английский язык, автор: Misaki59

Раскройте скобки.Поставьте в Past Simple илиPast Perfect.

1. We were late yesterday. When we (arrive) at the theatre the play already (begin).
2. When I (come) to the party Tom already (be) there, but he (go) home soon afterwards.
3. He (tell) a lie five minutes after he (promise) to tell the truth.
4. She (not want) to go to the cinema because she al-ready (see) the film.
5. At first I (think) I (do) the right thing but then I (realize) I (make) a terrible mistake.
6. She (ask) her father to help her because she (spend) all her money.
7. When we (enter) the flat we (see) that somebody (break) into it.
8. We (not be) hungry. We just (have) lunch.
9. She just (get) home when I (phone). She (be) shopping.
10. The teacher (explain) the rule and the stu-dents (begin) doing the exercise.
11. When I (come) home Mother already (make) dinner.
12. The sun (rise) when the farmer (start) his work.

13. The exam was over at noon. John (hand) in his paper to the teacher and (leave) the room. He (not answer) all the questions. He (write) very long answers to three questions and there (not be) enough time for the other two.
14. Henry came home late yesterday because he (meet) an old friend of his and they (be) to the pub together. When he (get) home at last the house (be) dark. Everybody (go) to bed.
15. I left home at 8 in the morning, (get) on a trolley-bus and (sit) down. The conductor (come) for the ticket. I (put) my hand into the pocket for the money but there (be) none. I (leave) the wallet at home. I (have) to get off and go home again. I (be) half an hour late at my office that day. I never (be) late before.

8 лет назад

Предмет: Математика, автор: annamarsy

16,35+(-7/20). Помогите пожалуйста!)

8 лет назад