Question

ПОМОГИТЕ ПОЖАЛУЙСТА.Реши систему уравнений {10x−2y=2 −4x+4y=20 Смотреть ответ vereschakodasha vereschakodasha Ответ:(1.5;6.5) Обьяснение: {10x-2y=2|2           {20x-4y=4 -4x+4y=20             -4x+4y=20 16x=24                   15-2y=2 x=1.5                       -2y=-13                           Новые вопросы в Алгебра ДОПОМОЖІТЬ ДУЖЕ ПОТРІБНО!!!!!!!​ 3*a^2*b^3 - a*b^3 - a^3*a - a^2*b^2*b + (1/2)*a*b*2*b^2 + 4*a*b*(1/2)*a*b^2 Дробно рациональноое уравнение x/(x + 2) + (x + 2)/(x - 2) = 8/(x ^ 2 - 4) Сумма вклада в конце срока рассчитывается по формуле сложных процентов. Годовая процентная ставка составляет 0,5%, первоначальный депозит составил 800 … 0 евро.Рассчитайте стоимость вклада (евро) через три года. Решите биквадратное уравнение: б) x ^ 4 + 6x ^ 2 - 27 = 0 . Предыдущий Следующий Вместе мы знаем больше КОМПАНИЯ Блог Карьера Условия пользования Авторское право Политика конфиденциальности Предпочтения cookie-файлов СООБЩЕСТВО Сообщество Brainly Brainly для школ и учителей Сообщество родителей Кодекс чести Правила сообщества Brainly Insights Стань помощником ПОМОЩЬ Зарегистрируйся Центр помощи Центр безопасности Договор о конфиденциальности полученной информации Установи приложение Brainly Скачай iOS-приложение Скачай для Android Школьные Знания.com PL: Brainly.pl ES: Brainly.lat PT: Brainly.com.br FR: Nosdevoirs.fr TR: Eodev.com RO: Brainly.ro ID: Brainly.co.id HI: Brainly.in PH: Brainly.ph US: Brainly.com (function() { window.process = window.process || {}; window.process.env = { NEXT_PUBLIC_PAYMENTS_ENDPOINT: "https://znanija.com/graphql/ru", NEXT_PUBLIC_HEADER_TOKEN_LONG: 'X-B-Token-Long', NEXT_PUBLIC_COOKIE_TOKEN_LONG: 'Zadanepl_cookie[Token][Long]', NEXT_PUBLIC_MARKET: "ru", NEXT_PUBLIC_BACKEND_MARKET: "ru", NEXT_PUBLIC_SPREEDLY_PKEY: 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Answer 1

Давайте решим каждую из ваших задач по очереди.

1. Решение системы уравнений:

Система уравнений:

1. 10x - 2y = 2
2. -4x + 4y = 20

Для решения этой системы уравнений можно воспользоваться методом сложения или вычитания. Давайте используем метод сложения, чтобы избавиться от переменной y.

Умножим первое уравнение на 2 и второе уравнение на 5, чтобы сделать коэффициенты y в обоих уравнениях одинаковыми:

1. 20x - 4y = 4
2. -20x + 20y = 100

Теперь сложим оба уравнения:

(20x - 4y) + (-20x + 20y) = 4 + 100

Упростим:

16y = 104

Теперь найдем y:

y = 104 / 16 y = 6.5

Теперь, когда мы знаем y, мы можем найти x, используя любое из исходных уравнений. Давайте используем первое уравнение:

10x - 2(6.5) = 2

10x - 13 = 2

10x = 2 + 13 10x = 15

x = 15 / 10 x = 1.5

Итак, решение системы уравнений {10x - 2y = 2, -4x + 4y = 20} - это (x, y) = (1.5, 6.5).

2. Ваш второй вопрос:

3a^2b^3 - ab^3 - a^3a - a^2b^2b + (1/2)ab2b^2 + 4ab*(1/2)ab^2

Давайте упростим это выражение:

3a^2b^3 - ab^3 - a^4 - a^2b^3 + ab^3 + 2a^2b^3 + 2a^2*b^3

Теперь сложим и упростим подобные члены:

3a^2b^3 - a^2b^3 - a^2b^3 + 2a^2b^3 = 2a^2b^3

Итак, упрощенное выражение равно 2a^2b^3.

3. Ваш третий вопрос:

Для расчета стоимости вклада через три года с использованием формулы сложных процентов, мы можем использовать следующую формулу:

$A = P(1 + r/n)^(nt)$

Где:

• A - конечная сумма (стоимость вклада через три года)
• P - начальный депозит (800 евро)
• r - годовая процентная ставка (0.5% или 0.005 в десятичной форме)
• n - количество раз, когда проценты начисляются в год (предположим, что они начисляются ежегодно, поэтому n = 1)
• t - количество лет (3 года)

Подставим значения в формулу:

$A = 800(1 + 0.005/1)^(1*3)$

$A = 800(1.005)^3$

$A ≈ 800 * 1.015075125$

$A ≈ 812.06$

Итак, стоимость вклада через три года составит примерно 812.06 евро.