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veraveta
veraveta
19.11.2020 15:32 •  Математика

Рівняння математика 5 клас множення і ділення десяткових дробів (0,5х - 5,12) • 0,25 = 2,645

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Ответ:
PeaceDuck1337
PeaceDuck1337
18.01.2020 17:31

Смотрите.

1) Обозначаем t — сколько времени они шли в первый день, тогда (t-1) — сколько во второй.

2) Теперь следующее соотношение — про 6 километров. Пускай в первый день они км, а во второй день — s2, тогда нам дано:

s1-s2=6.

3) Вспоминая, что расстояние=время*скорость (s=v*t), подставляем в эту формулу вместо s1 и s2:

(3,5*t)-(3*(t-1))=6.

Упрощаем:

3,5t-3t+3=6;

0,5t=3;

t=6.

ответ: Таким образом, в первый день они шли 6 часов. Во второй день — 6-1=5 (часов во второй день — 3*5 = 15 (км)

Пошаговое объяснение:

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Ответ:
синегривка2
синегривка2
22.04.2020 22:49

Пошаговое объяснение:

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