Question

{3x - 5y = 14;2x – 7y = 2.решить систему управлений способом сложения.​ Смотреть ответ OblivionFire OblivionFire Ответ: {3х-5у=14, |·2. {2х-7у=2. |·(-3). {6х-10у=28, {-6х+21у=-6. ------------------------ 11у = 22 ; у = 2 ; ------------------------ 6х-10·2=28. 6х-20=28. 6х=28+20 6х=48 х = 8 Ответ : ( 8 ; 2 ). Новые вопросы в Математика Один з кутів чотирикутника дорівнює 120º, а інші – між собою рівні. Знайдіть градусну міру найменшого кута даного чотирикутника.​ Одна из сумм увеличилась на 15. Насколько следует уменьшить масштаб другого? добавка, уменьшающая сумму на 7.​ А:знайти 13% від 1,5 Б:число 40%якого становить число 9 від 60 В:скільки відсотків становить число 9 від 60ПОМОГИТЕ СРОЧНО!!!!!ПОЖАЙЛУСТА!!!!!ДАЮ 30 Б … АЛОВ!!!!!!!!!​ ПОМОГИТЕЕЕЕЕЕЕЕЕЕЕЕЕЕЕ ПОМОГИТЕЕЕЕЕЕЕЕЕЕЕЕЕЕЕ 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

It looks like you've provided a system of equations and solved it using the method of addition (also known as the method of elimination). The solution you provided for the given system of equations is correct: (x, y) = (8, 2).

Now, moving on to the other questions you've asked:

1. Finding the smallest angle of a quadrilateral: If one angle of a quadrilateral is 120 degrees, and the other angles are equal to each other, then the sum of the three equal angles must be 360 - 120 = 240 degrees. Since there are three equal angles, each of those angles would be 240 / 3 = 80 degrees.

2. Increasing and decreasing sums: It seems you're asking about a situation where one sum increased by 15 and you want to know how much the other sum should be decreased by, given that subtracting 7 from the second sum decreases it. However, the exact values of the sums are missing, so I can't provide a specific answer without more information.

3. Percentage calculations:

   • A: To find 13% of 1.5, you multiply 1.5 by 0.13. So, 13% of 1.5 is 0.195.
   • B: If a number is 40% of 60, then the number is 0.4 * 60 = 24.
   • C: To find what percentage 9 is of 60, you divide 9 by 60 and then multiply by 100. So, (9 / 60) * 100 = 15%.

If you have any more questions or need further assistance, feel free to ask!