Предмет: Математика, автор: germingrejndzer

УМОЛЯЮ ХЕЛП 1) Найдите среднее арифметическое чисел: 3, 7, 5,18, 21, 18, 19
2) Найдите медиану ряда чисел: 3, 7, 5,18, 21, 18, 19
3) Найдите решение системы уравнений способом подстановки: 3х+у=5 х+2у=0
4) Найдите значение у, если уравнение y = –x + 3 имеет решение (-2; у)

Ответы

Автор ответа: luizakomalhodzaeva

Ответ:1) 91/7=13

2)18

Пошаговое объяснение:

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: andreydad

Ex. 22. (В, C) Put the verbs in brackets into the Past Indefinite and the Past Continuous.Mary (play) the piano; John (read); my wife (sew) when suddenly we all (hear) a shout.When the doctor (leave) the hospital, he (catch) a glimpse of himself in the glass front door.When her father (come) in she (sit) before a red tea-table, finishing a very good tea. 4. Nextday, while he (shave) he (cut) himself slightly. 5. The door of his room (be) open; his mother still (stand) at the window. 6. And, smiling to himself, he (begin) to make plans, fantastic plans for the future. He still (smile) when he (walk) up the rock-cut steps. 7.1 (sleep) soundly when the phone (ring). 8. We (sit) on our front porch when Mr Smith (drive) up in his new car. 9. Crosby (cross) the street when the car (strike) him. 10. It (drizzle) when they (come) out of the house. 11. When the World War (break), John (live) in Holland. 12. It (get) dark and I (suggest) that we should go down. 13. John (come) in, (look) at the fire, (stand) a moment, (turn) and (go) away. 14. As I (walk) home yesterday, I (meet) a beggar who (ask) me for some money. 15. We (come) into the dining-room while our parents (eat) supper. 16. She (run) down the stairs and (go) to the library, where her husband (stand) with his mother. 17. Mike (raise) his eyes from the book and (look) out of the window. It still (snow). 18. We (drive) at about forty miles an hour when the accident (happen). 19. You (have) a good time at those parties? 20. A fortnight later Holt (fall) and (hurt) himself when he (ride) his motorcycle. 21. He (go) into the kitchen and (get) himself a cup of coffee. 22. Eric (go) into the library and (sit) down to read the letter. The fire (crackle) merrily in the fireplace, and outside the wind (howl). 23. He (take) a cushion, (put) it behind and (lean) back. 24. At half past four I (put) on the lights. 25. When I (be) a boy, I (want) to be an actor. 26. While he (wait) to cross Fifth Avenue, a man standing beside him (cough) painfully. 27. She (draw) aside the curtains and (look) out into the Square. Two cats (stand) in the light of a lamp - narrow, marvellously graceful. 28. When I (hear) his knock I (go) to the door and (open) it, but I (not/recognize) him at first because I (not/wear) my glasses. 29. When they (walk) up the street together they (begin) to talk. 30. Your telegram (come) just as I (leave) home. 31. John (talk) with his boss when I last (see) him. 32. When he (arrive) home, he (go) straight to the sitting room and (take) off the picture.
Срочно нужно.

1 год назад

Предмет: Русский язык, автор: 653ника

Они исчезают под безжалостным напором тракторов и бульдозеров , красота нашей земли хрупка и уязвима.Красоту пейзажей в России создали бескрайние леса,речные долины и поймы , лесные поляны и опушки , кустарники и мелколесье у ручьев и оврагов , старые деревни и хутора ч многоярусной растительно дворов и улиц. Кто сохранит потомкам хотя бы малую часть русского пейзажа , который вдохновлял и Левитана , и Шишкина , и других талантливых соотвенников? Разобрать предложения ну это так подлежащие сказуемое подчеркнуть короче каждое слово чем является

1 год назад

Предмет: Русский язык, автор: ALugneeva01

приземлившись,возвратившись и нахмурившись морфологический разбор

1 год назад

Предмет: Математика, автор: Sandra11q4uv

С - 2 = 1

помогите пожалуйста

8 лет назад

Предмет: Математика, автор: аня2392

запиши решение задачи сначала по действиям,а потом в виде одного выражения.в спортзале находились 12 мальчиков а девочек на 4 меньше.Сколько всего

8 лет назад