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{2x-3y=-3 / -6x+9y=9 Смотреть ответ sandersholse256 sandersholse256 {2x-3y=-3, |*3 {-6x+9y=9 {6x-9y=-9, {-6x+9y=9 0x+0y=0 очень логичная система))) Новые вопросы в Математика Был бы благодарен за подробное объяснение Бен Ганн неважно себя чувствовал. Он знал, что ему поможет живительный напиток из трын-травы. На 4 части тры … н-травы он взял 1 часть цикория. Сколько бочонков понадобится пирату, если каждый бочонок вмещает 250 г. и на изготовление напитка для всей команды было израсходовано трын-травы на 36 кг больше, чем цикория? помогитеееееееееееееееееееееееееее помогитее пожалуйста розпишіть для відсталого При каких значениях параметра а y=5x+7a2+3а и y=-x+6a2-a+5 прямые является точкой пересечения прямых на оси ординат?срочно помогите Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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Answer 1

Давайте начнем с решения системы уравнений:

1. {2x - 3y = -3
2. {-6x + 9y = 9

Первым шагом мы можем привести первое уравнение к удобному виду для метода исключения (метод сложения):

1. Умножим первое уравнение на 3: 3(2x - 3y) = 3(-3) 6x - 9y = -9

Теперь у нас есть два уравнения:

3. {6x - 9y = -9

4. {-6x + 9y = 9

5. Теперь сложим уравнения 3 и 4, чтобы исключить переменную y:

(6x - 9y) + (-6x + 9y) = -9 + 9 0x + 0y = 0

Это верное утверждение 0 = 0, что означает, что уравнения 3 и 4 суть одно и то же уравнение и выражают одну и ту же прямую. Иными словами, у нас есть бесконечное число решений системы уравнений, и они все лежат на одной прямой.

Графически, это будет представлять собой одну и ту же прямую, так как они совпадают.

Теперь, перейдем к следующему вопросу, касающемуся пирата и его напитка:

Пусть x - это количество частей трын-травы, взятых пиратом, и y - количество частей цикория.

Условия задачи:

• Объем каждого бочонка: 250 г.
• Пират взял трын-травы на 4 части больше, чем цикория: x = y + 4
• Общий вес трын-травы составляет 36 кг больше, чем вес цикория: 250x = 250(y + 4) + 36

Теперь мы можем решить эти уравнения:

1. x = y + 4
2. 250x = 250(y + 4) + 36

Подставим значение x из первого уравнения во второе:

250(y + 4) + 36 = 250y + 250(4) + 36 250y + 1000 + 36 = 250y + 250 + 36 250y - 250y = 250 + 36 - 1000 0 = 286 - 1000 0 = -714

Уравнение 0 = -714 ложно, что означает, что данная система уравнений не имеет решений. Возможно, в задаче допущена ошибка, и вам стоит перепроверить условия.

Наконец, перейдем к последнему вопросу о прямых, являющихся точкой пересечения на оси ординат:

Для того чтобы определить точку пересечения прямых на оси ординат, нужно приравнять значения y обоих уравнений к 0 и решить уравнения относительно x:

1. y = 5x + 7a^2 + 3a (Уравнение 1)

2. y = -x + 6a^2 - a + 5 (Уравнение 2)

3. Приравняем y к 0 в Уравнении 1: 0 = 5x + 7a^2 + 3a

Теперь решим это уравнение относительно x: 5x = -7a^2 - 3a x = (-7a^2 - 3a) / 5

2. Приравняем y к 0 в Уравнении 2: 0 = -x + 6a^2 - a + 5

Теперь решим это уравнение относительно x: x = 6a^2 - a + 5

Теперь у нас есть выражения для x при y = 0 в обоих уравнениях. Чтобы найти точку пересечения прямых на оси ординат, приравняем эти выражения друг к другу:

(-7a^2 - 3a) / 5 = 6a^2 - a + 5

Теперь решим это уравнение относительно параметра "a". После нахождения значения "a" можно будет вычислить соответствующее значение x и y.

Извините, но данное уравнение слишком сложно для аналитического решения, и требует численного метода решения. Пожалуйста, уточните, если вы имели в виду другой вопрос, или уточните условия задачи, чтобы я мог предоставить более точный ответ.