Сколько двузначных натуральных чисел делится на 4( )

12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96
то есть получается 22 числа

Пошаговое объяснение:

Признак делимости на 4: число делится на 4, если две последние цифры числа образуют число делящеяся на 4.

12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80,84,88,92,96.

Т.о. 22 числа

Пошаговое объяснение:

Нам нужно решить уравнение (2,5y - 4)(6y + 1,8) = 0.

Для этого мы рассмотрим и проанализируем заданное уравнение.

Наше уравнение представляет собой равенство в правой части которой стоит ноль, а в левой произведение двух скобок.

Известно, что произведение равно нулю, когда хотя бы один из множителей равен нулю.

Чтобы найти все корни уравнения приравняем каждый из множителей к нулю и решим полученные уравнения.

1) 2.5y - 4 = 0;

2.5y = 4;

y = 4 : 2.5;

y = 1.6;

2) 6y + 1.8 = 0;

6y = -1.8;

y = -1.8 : 6;

y = -0.3.

ответ: y = 1.6; y = -0.3.

Пошаговое объяснение:

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