Question

{4x+7y=11{5x-2y=40 помогитеее!!!​ Смотреть ответ andreypetro253 andreypetro253 {4х+7у=11. {4х+7у=11 {5х-2у=40. {х=8+2/5у 4(8+2/5у)+7у=11 у=-105/43 х=8+2/5(-105/43) х=302/43 Новые вопросы в Математика 1. Яка з прямих відсікає на осях координат Ox та Oy , відповідно відрізки a = 2, b = 5 ?5 x + 3y - 10 = 05 x + 3y + 10 = 05 x + 2y - 10 = 05 x - 2y … - 10 = 02. Яка з прямих проходить через точку M0 (1, 2)?2x + 4у - 8 = 02x + 3у - 8 = 02x - 8у + 3 = 02x - 3у - 8 = 0​ обчисліть площину заштрихованої фігури зображеної на рисунку y=3/x2 та y=x/9(срочно ) Сколько нечетных трехзначных чисел можно составить из чисел 2, 3, 4, 7, 9? Сррчноооо!!!!!!!! Не виконуючи обчислення коренів x¹ і x² квадратного рівняння 5x²+4x-10=0, знайдіть значення виразу x1 x2-10(x1+x2) ЗадачаЛюдське вухо сприймає звуки з частотою від 20 гц до 20 кгц. Яка максимальна довжина хвилі належить до інтервалу сприйняття звукивих хвиль? 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Answer 1

Давайте разберем уравнения и решения, представленные в вашем сообщении.

У вас есть система уравнений:

1. 4x + 7y = 11
2. 5x - 2y = 40

Вы предложили решение:

1. Первое уравнение преобразуется в х=8+2/5y.
2. Вы нашли значение y: y = -105/43.
3. Затем нашли значение x, используя y: x = 8 + 2/5 * (-105/43) = 302/43.

Это верное решение системы уравнений. Значения x = 302/43 и y = -105/43 удовлетворяют обоим уравнениям.

Что касается других вопросов в вашем сообщении, я могу помочь с ними:

1. "Яка з прямих відсікає на осях координат Ox та Oy , відповідно відрізки a = 2, b = 5?" - Перше уравнение 5x + 3y - 10 = 0 пересекает оси Ox и Oy на отрезках длиной 2 и 5, соответственно.

2. "Яка з прямих проходить через точку M0 (1, 2)?" - Уравнение 2x + 4y - 8 = 0 проходит через точку M0 (1, 2).

3. "Обчисліть площину заштрихованої фігури зображеної на рисунку y=3/x^2 та y=x/9" - Для расчета площади фигуры, вам необходимо указать граничные точки и метод интегрирования. Площадь между кривыми может быть найдена с использованием определенного интеграла.

4. "Сколько нечетных трехзначных чисел можно составить из чисел 2, 3, 4, 7, 9?" - Нечетные трехзначные числа можно составить, используя 3, 7 и 9 в сотых, десятых и единицах разрядов. Всего можно составить 3! = 6 таких чисел.

5. "Не виконуючи обчислення коренів x₁ і x₂ квадратного рівняння 5x²+4x-10=0, знайдіть значення виразу x₁x₂-10(x₁+x₂)" - Этот вираз связан с корнями квадратного уравнения. Мы можем использовать свойства сумм и произведений корней. x₁x₂ = c/a и x₁ + x₂ = -b/a. Подставьте значения a, b и c из уравнения, чтобы найти искомое значение.

6. "Людське вухо сприймає звуки з частотою від 20 гц до 20 кгц. Яка максимальна довжина хвилі належить до інтервалу сприйняття звукивих хвиль?" - Максимальная длина волны будет в пределах этого интервала при минимальной частоте (20 Гц) и скорости звука в воздухе (примерно 343 м/с). Вы можете использовать формулу для длины волны: λ = v/f, где λ - длина волны, v - скорость звука, и f - частота. В данном случае, λ = 343 м/с / 20 Гц = 17.15 метров. Таким образом, максимальная длина волны, воспринимаемая человеческим ухом, составляет примерно 17.15 метров.