Question

Нужно решить систему с помощью графического способа {x-y=-2 {2x+y=5 (Это если что два уравнения но в одной системе Смотреть ответ Пеппер Пеппер Ответ: (1; 3) Объяснение: {x-y=-2   у=х+2      х=0  у=2   х=1  у=3 {2x+y=5   у=5-2х   х=0  у=5   х=1  у=3 Новые вопросы в Алгебра пассажир проехал 120 км на одном поезде, а затем вернулся на другом поезде, который проехал на 5 км в час больше. На обратном пути он потратил на 20 м … инут меньше. Сколько часов пассажир провел за весь путь?​ 9. (2б.) Побудуйте графік функції y= |x|+x-4 6. (26.) Розкладіть на множники: a) x3 - 36x б) а5 - 1000a² в) 4x² -4xy+ y² - 16 г) а² - 25b² + a + 5b Розв'яжіть рівняння: (x - 9)(x + 9) - (x - 4)2 = -17. Напиши есей на тему «Чого я навчився, вивчаючи розділ «Многокутники. Площі геометричних фігур». Обери професію, яка є тобі цікавою та опиши дві сторон … и теми: Чому знання даної теми потрібне в цій професії? Чому знання даної теми не потрібне в обраній професії? Есей повинен містити щонайменше 100 слів. 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Answer 1

Давайте начнем с решения системы уравнений методом графического способа:

Система уравнений:

1. x - y = -2
2. 2x + y = 5

Для начала, давайте выразим y из первого уравнения:

1. x - y = -2 y = x + 2

Теперь мы можем подставить это значение y во второе уравнение: 2. 2x + y = 5 2x + (x + 2) = 5 3x + 2 = 5

Выразим x: 3x = 5 - 2 3x = 3 x = 3 / 3 x = 1

Теперь, когда у нас есть значение x, мы можем найти значение y, используя первое уравнение: y = x + 2 y = 1 + 2 y = 3

Итак, решение системы уравнений: x = 1 y = 3

Ответ: (1; 3)

Теперь, касательно других вопросов:

1. Пассажир провел 120 км на одном поезде, а затем вернулся на другом поезде, который двигался на 5 км/ч быстрее. Чтобы найти общее время в пути, вам нужно учитывать, что скорость на обратном пути была выше. Вы можете использовать уравнения расстояния и времени для этого.

2. Для построения графика функции y = |x| + x - 4, нарисуйте оси x и y на бумаге или в программе для построения графиков и затем находите значения y для различных значений x. Учтите, что у модуля функции есть два ветви: одна, когда x положительно, и вторая, когда x отрицателен.

3. Разложите на множители указанные выражения. Это можно сделать путем факторизации, например, с помощью разности квадратов или других методов.

4. Решите уравнение (x - 9)(x + 9) - (x - 4)^2 = -17, используя алгебраические методы, такие как раскрытие скобок и приведение подобных слагаемых.

5. Напишите эссе на заданную тему о том, чего вы научились, изучая раздел "Многокутники. Площи геометрических фигур". Выберите профессию, которая вас интересует, и опишите две стороны этой профессии.