Алгебра. 9 класс. 50 типовых вариантов экзаменационных работ для подготовки к ГИА. Е. В. Неискашова

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Алгебра. 9 класс. 50 типовых вариантов экзаменационных работ для подготовки к ГИА - Е. В. Неискашова


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его смежных сторон относятся как 3: 7. Найдите длины сторон этого прямоугольника.»

      Пусть a и b − длины сторон (в см) этого прямоугольника, причем a − длина большей стороны. Какая из приведенных ниже систем уравнении не соответствует условию задачи? a + b = 20,

      12. Решите неравенство 5x − 12(x − 1) < −2.

      1) x > 2.

      2) x > 0,5.

      3) x < 2.

      4) x < 0,5.

      13. На рисунке изображен график функции y = 3x + 6x. Используя график, решите неравенство 3x2 + 6x >= 0.

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