Предмет: Математика, автор: alinatershbfi

решите пожалуйчта задачу.
На первом участке пути поезд шёл 2 ч. со скоростью 60 км/ч., а на втором он шёл 3 ч. С какой скоростью шел поезд на втором участке, если его скорость на двух участках была равна 51 км/ч.

jekadva: а не пропущено ли СРЕДНЯЯ СКОРОСТЬ

alinatershbfi: да извеняюсь

alinatershbfi: средняя скорость на двух участках была равна 51км/ч

alinatershbfi: спасибо

Ответы

Автор ответа: jekadva

(2*60+3x):5=51
120+3x=51*5
120+3x=225
3x=225-120
3x=105
x=105:3
x=35км/ч скорость на втором участке

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: slavavittek

Read the selection without stopping to choose the correct missing words. Then read it again, pausing to underline the correct words. Finally, read the selection again to see if it makes sense.

I __1__ by Mr. J. Gerald Cowcamper’s house one day and was greeted by a rather old looking dog. She was a gentle beast who __2__ her tail as she pushed her nose against my hand.
“What’s her __3__?” I asked.
“I call her ‘Dog Face,’” replied the old __4__.
“__5__ do you call her that?” I inquired.
“Isn’t it obvious?” asked Mr. Cowcamper.
“Not really.”
Mr. Cowcamper cradled the old animal’s head in his hands. “If you __6__ at just the right angle, you can see that she seems to have a dog’s face,” he __7__.
“But she is a __8__!” I said.
“Shhhh!” Mr. Cowcamper responded with the loudest whisper I have ever __9__. “Don’t let her hear you say that!”
I said __10__, because I didn’t know what to say.

1.stopped ran went carried
2 chased bit wagged lost
3 breed problem age name
4 dog cow lady gentleman
5 how why where when
6 listen look call wonder
7 explained asked smelled knew
8 person female dog potato
9 spoken seen found heard
10 here yes words nothing

1 год назад

Предмет: Українська мова, автор: MilanaPopovych

Потрібно скласти 4 речення з прямим порядком слів, і 4 речення з непрямим порядком слів

1 год назад

Предмет: Английский язык, автор: bezdbnaanna1712

Пожалуйста, ПЕРЕВЕДИТЕ!!!

My favourite school subject is English i like it because it is interesting and also because i am quite good at it! We have English Language classes three times a week, on Mondays at 10 o'clock, on Wednesdays at 11 o'clock and on Thursday afternoons at 3 o'clock. E class lasts 50 minutes. I never get bored.

At the moment were learning about synonyms and antonyms. A synonym is a word that means the same as another word, for example little and small. Antonyms are opposites , like old and young. It s not difficult. Sometimes spelling is difficult. We have to write ten words. Sometimes the words are quite easy but this week one of the words was brilliant. That's a difficult one! Most of the class ( including me) wrote briliant with one i!

My English Language teacher is called Mr Thornton. He can speak four foreign languages . He can speak French, German, Spanish and Russian. He says that it's very important to understand your own language first. When you understand how verbs change in one language, it's much easier to learn another language. I think that's true. I learn French at school and I think it's quite easy.
Mr Thornton's friendly and kind, but he gives us lots of homework. This week lve got write a composition . I like writing so I don't mind. We've got an exam next week, so i have to study too. I think I'm a good student . I always do my homework. I pass most of my exams but I'm not good at Maths!

1 год назад

Предмет: Алгебра, автор: Memosie

Решите с объяснениями ,пожалуйста (Свойства + пример).
233 последние 2

7 лет назад

Предмет: Математика, автор: 4688111

Определите длину окружности , изображенной на картинке. Длину клетки считайте равной 1 см. Ответ дайте в метрах.
В расчетах принимайте π=3.

7 лет назад