Предмет: Математика, автор: Аноним

(ху-2х+5у)*3+2(2ху+3х-6у) если х=1.2\7;у=- 5\6

Ответы

Автор ответа: Аноним

(ху - 2х + 5у)*3 + 2*(2ху +3х - 6у) = 3ху - 6х + 15у + 4ху + 6х - 12у = 7ху + 3у = у*(7х + 3)
если х = 1. 2/7; у = -5/6, то:

$- \frac{5}{6}(7*1 \frac{2}{7}+3) = - \frac{5}{6}(7* \frac{9}{7}+3)=- \frac{5}{6}(9+3) =-\frac{5}{6}*12=- \frac{60}{6}=-10$

х = $1 \frac{2}{7}= \frac{1*7+2}{7}= \frac{9}{7}$

Ответ: -10

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: shiriev2017

Помогите пожалуйста с работой

1. Переведите предложения, содержащие конструкцию Complex Object.

1. Our boss wanted the fax send at once;
2. The young mother watched her child playing with a toy.
3. That made me change my mind.
4. They expect us to give a 10% discount of the contract value.
5. I should very much like it to be made clear to me.

2. В следующих предложениях определите и подчеркните причастия, переведите предложения.

1. The woman speaking now is our product marketing manager.

2. There are many students in our group taking part in all kinds extracurricular activities.

3. As we were given dictionaries, we managed to translate the article easily.

4. Everything written here is quite right.

5. While speaking to my colleague some days ago, I forgot to ask him about his dealing with advertising agency.

3. Определите (подчеркните) прилагательные и наречия, переведите предложения.
1. Are the streets in our city cleaner now than they were a few years ago?

2. Life began in water, and most probably in sea water.

3. The task was rather difficult, only few students understand it.

4. Better late than never.

5. Art is long, life is short.

4. Переведите следующий текст на русский язык.
Jenny’s Job.
Most New Yorkers live in apartments and in most apartments there is at least one dog. Life in New York could be very dull for those animals, but fortunately there is an army of dog walkers to make the dogs happy.
I t was in Central park, Manhattan, that I met Jenny and her dogs for the first time. She was a dog walker at 20 dollars a week for each dog. She looked very small beside the two big white dogs, the two little brown ones in front of her, and the grey poodle behind her. I pointed to the group and said, "Beauty and the beasts what a charming picture!"
"Thank you very much, «she said with a smile.
"How often do you take them out?" I asked. "Five times a week...»
While we were talking, the dray poodle got loose and rushed to the pond. From a small bridge it fell into the water and could not get out again. In my new suit I jumped and landed in three feet of dark green water and one foot of mud. The poodle did not appreciate my help very much and bit my finger. However I picked the dog up and took it back to Jenny. She was very grateful and smiled at me.
As I walked home I wondered why I had jumped into the water for I really don’t like poodles very much.
Выполните задания к тексту:
1.Поставте 3 вопроса разных типов.
2. Выпишите 5 глаголов, укажите их три формы.
3.Ответьте на вопросы:

1) What does a dog walker do?
2) What happened to Jenny’s grey poodle?
3) Why did the man jump into the water?

1 год назад

Предмет: Русский язык, автор: creativerostiktop4ik

Сочинение рассуждение на тему школьная пренадлежность если её найдут через 100 лет?

1 год назад

Предмет: Английский язык, автор: Аноним

найдете ошибку Who was is playing the guitar when you came

1 год назад

Предмет: Психология, автор: oksanakot97

как забыть мечту??????

7 лет назад

Предмет: Математика, автор: sladkayadevulkamadam

РЕШИТЕ СТЕПЕНЬ ЧИСЛА (Я ЗНАЮ КАК РЕШАТЬ НУЖНА ПРОСТО ФОРМУЛА) СРОЧНО!!

7 лет назад