Предмет: Математика, автор: Deny1313

Знайдіть 15% від кореня рівняння 2,8х + 4,5х - 3,1х = 84.

Ответы

Автор ответа: berezhkov

Ответ: Добре!

Пошаговое объяснение:

Спочатку розкриваємо дужки за допомогою закону асоціативності додавання:

2,8х + 4,5х - 3,1х = (2,8 + 4,5 - 3,1)х = 4,2х

Отже, маємо рівняння 4,2х = 84. Розв'язуємо його:

4,2х = 84

х = 84 / 4,2 = 20

Тепер знаходимо корінь рівняння:

√20 = 4,4721...

Щоб знайдти 15% від цього кореня, множимо його на 0,15:

0,15 * 4,4721... ≈ 0,6708...

Отже, 15% від кореня рівняння 2,8х + 4,5х - 3,1х = 84 дорівнює близько 0,6708.

Автор ответа: sofikachai

Ответ:

поставь пожалуйста пять звёзд и "лучший ответ"

Приложения:

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Геометрия, автор: agentillya1

СРОЧНО ДАЮ 40 БАЛІВ: У ромбі АВСД < ОАД=30° де О точка перетину діаглналі ромба. Діагональ ВД = 8см. Обчисліть периметр ромба

1 год назад

Предмет: Математика, автор: sofv70545

пожалуста срочно помогите дам 100 балов и прошу правильно

1 год назад

Предмет: Физика, автор: zlatademan12

Автомобіль проїхав 160 км за 3 год, а 240 км - за 2 год. Чому дорівнює середня швидкість руху на всьому шляху?

1 год назад

Предмет: Другие предметы, автор: Аноним

Решите плиз только те кто уверен в своём ответе!

6 лет назад

Предмет: Английский язык, автор: dmsgtm1208

СРОЧНО ПОМОГИТЕ!!!!

How Did Disneyland Start?

One day, a man named Walt Disney took his daughters to an amusement park. At the

amusement park, they went on the rides, played games, and saw animals. But the park was not

exciting. It was also dirty. He looked around and said, "I want to take my children to a better

place. I want families to have fun together."

Walt Disney was famous for his movies. He was also famous for his cartoons. Now

Disney started to think about a new park. He wanted a park with different parts with special

names. One part was "Fantasyland" and another part was "Adventureland." He also wanted to

use ideas from his movies and cartoons. His most popular cartoon was Mickey Mouse. Disney

wanted Mickey Mouse and other cartoon people to walk around the park and talk to the guests.

Disney's dream of a special park took many years to come rtue. People did not understand

his ideas. Nobody wanted to give him money. So Disney used all his own money to build the

park. On July 17, 1955, Disneyland opened in Anaheim, California. It was an immediate hit. The

first year, about five million people went to Disneyland. People came from all over the United

States and all over the world.

Walt Disney wanted Disneyland to be perfect. Every night, workers washed the streets.

They made sure the streets were clean. They also made sure there was no chewing gum on the

ground. They painted the signs again at night. They wanted the signs to look new.

Disneyland always had many plants and flowers. But Disney did not want any signs that

said, "Do not walk on the plants." So every year, the workers changed 800,000 plants and put in

new ones.

Disney wanted the workers to be happy and clean all the time. He started a special school

for his workers called the University of Disneyland. The workers learned to be happy and polite

to guests. They could not wear perfume, jewelry, or bright nail polish. They had to follow' rules

for how to dress and how to wear their hair.

Walt Disney became very rich. He was a millionaire. He died in 1966, but his dream of

more Disneylands came true. In 1971, Walt Disney World opened in Orlando, Florida. Today,

there are Disneylands in Tokyo and Paris.

I. Write the correct words in the blanks

cartoons guests amusement park polite immediate

1. Disney took his daughters to an They went on rides, played

games and saw animals.

2. Disney drew funny pictures of people and animals. He drew

3. The workers at Disneyland are . They are nice and respectful.

4. Many people visit Disneyland, but they don't live there. They are

5. Disneyland was an hit. Everybody liked in right away

II. Match the words in Column A and Column B to make sentences

I. More Disneylands opened a. to open a special park.

2. Walt Disney wanted b. in California.

3

The first Disneyland opened c. in Tokyo and Paris.

4. People came d. happy and polite.

5. Workers wash e. to Disneyland from all over America.

6. Disney's workers are f. the streets of Disneyland every night.

III. True or False

1. People gave Disney money to start Disneyland.

2. About five million people went to Disneyland in the first year.

3. They changed the plants every week at Disneyland.

4. Workers at Disneyland are always polite.

5. There is a Disneyland in London.

6. The first Disneyland opened in Orlando, Florida.

IV. Complete the sentences

1. Walt Disney was

2. Disneyland always had

3. Walt Disney wanted

4. The workers learned

5. Disneystartedaspecial

V. Answer the questions

1. When do you usually have fun?

2. What signs do you see on the street a lot?

3. What is an exciting place to go?

4. What is your favorite cartoon?

5. Who are you always polite to?

6. What do you like to do at an amusement park?

6 лет назад