Предмет: Математика, автор: riko2012ezhik

В четырехугольнике MNPK сторона MN = у см. 1) Выразите остальные стороны этого четырехугольника, если: a) NP на 4 см меньше MN; b) PK в 3,25 раза больше MN; c) MK на 2 см больше PK. 2) Зная, что периметр MNPK равен 49 см и используя данные пункта 1, составьте уравнение. 3) Решите уравнение, полученное в пункте 2. Найдите длину MN. 6. Найдите значение выражения: срочнооо​

Ответы

Автор ответа: maltsevaanastasiia14
1

Відповідь:

1)

a) NP = MN - 4

b) PK = 3.25 * MN

c) MK = PK + 2

2) Уравнение периметра:

MN + NP + PK + MK = 49

MN + (MN - 4) + 3.25MN + (3.25MN + 2) = 49

8.5MN - 2 = 49

8.5MN = 51

MN = 6

3) Решение уравнения:

MN = 6

6) Шаг 1: Вычислим -0,64*(-2,7)

-0,64*(-2,7) = 1,728

Шаг 2: Вычислим -0,36*(-2,7)

-0,36*(-2,7) = 0,972

Шаг 3: Вычислим 5,4 * 1/2

5,4 * 1/2 = 2,7

Шаг 4: Вычислим -0,36*(-2,7)/5,4 * 1/2

0,972 / 2,7 = 0,36

Шаг 5: Вычислим -0,64*(-2,7)-0,36*(-2,7)/5,4 * 1/2 : ( -0,09)

1,728 - 0,36 / 0,36 / (-0,09) = 1,728 - 0,36 / -4 = 1,728 + 0,09 = 1,818

Ответ: 1,818

Покрокове пояснення:


maltsevaanastasiia14: ок
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riko2012ezhik: спасибо
riko2012ezhik: ты лучший/лучшая
maltsevaanastasiia14: ))
demyanpabg: Что означает /
maltsevaanastasiia14: деление
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riko2012ezhik: 1/5
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