Question

{3x+2y=7 {6x+4y=15 розв*язати графічним способом Смотреть ответ Пеппер Пеппер Ответ: Коренів немає. Объяснение: {3x+2y=7;  2у=7-3х;  у=(7-3х)/2;          х=1  у=2;      х=3  у=-1 {6x+4y=15;  4у=15-6х;  у=(15-6х)/4      х=2,5  у=0;  х=4;  у=-2,25 Новые вопросы в Алгебра Что означает * это в решениях по алгебре на ваших решениях Сколько будет sin куб альфа минус cos куб альфа если известно что sin альфа минус cos альфа равно 0.25 Известно что sin альфа+cos альфа=0,75. Найдите значение выражения sin^3 альфа+cos^3 альфа пожалуйста помогите ​ Известно что sin альфа+cos альфа=0,75. Найдите значение выражения sin3 альфа+cos3 альфа​ 4+4:2*(5+1)=18 Вірно? 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

Для розв'язання системи рівнянь графічним способом, спробуйте побудувати графіки обох рівнянь і знайти точку перетину.

1. Рівняння 1: $3x + 2y = 7$. Перепишемо його у вигляді $y = \frac{7 - 3x}{2}$, ізолюючи $y$.

2. Рівняння 2: $6x + 4y = 15$. Перепишемо його у вигляді $y = \frac{15 - 6x}{4}$, ізолюючи $y$.

Тепер побудуйте графіки цих двох рівнянь на координатній площині. Перетин двох графіків вказуватиме на розв'язок системи. Якщо графіки паралельні або не перетинаються, то коренів немає.

З вашими виразами для $y$:

1. $y_1 = \frac{7 - 3x}{2}$
2. $y_2 = \frac{15 - 6x}{4}$

Зображення цих двох ліній на графіку допоможе вам знайти розв'язок. Якщо вони перетинаються, то це буде розв'язком системи. Якщо не перетинаються, то коренів немає.

Щодо ваших інших питань:

• Знак "*" у вашому тексті виглядає як помилка або неналежне використання символу.
• Для обчислення значення виразу $\sin^3 \alpha - \cos^3 \alpha$ спершу потрібно знайти значення $\sin \alpha$ та $\cos \alpha$.
• Знайдення значення виразу $\sin^3 \alpha + \cos^3 \alpha$ також вимагає обчислення значень $\sin \alpha$ та $\cos \alpha$.
• Вираз $4 + 4:2 \cdot (5 + 1) = 18$ вірний.