Предмет: Математика, автор: NikitaDs10

Дорога складаеться з підйомів, спусків та горизонтальних ділянок. Прийоми становлять 30% усього шляху, спуски 25% усього шляху, а решту 94,5 км- горизонтальної ділянки. СРОЧНО

iramazurk: Вопрос какой?

NikitaDs10: Знайдіть довжину дороги?

miki68: 100-(30+25)=45% это 94,5 км , 94,5*100:45=210 км вся дорога

Ответы

Автор ответа: iramazurk

Ответ:

Пошаговое объяснение:

Вся дорога = х км

Подъёмы = 0,3х

Спуски = 0,25х

Горизонтальные = 94,5 км

0,3х + 0,25х + 94,5 = х
0,55х + 94,5 = х
0,55х - х = -94,5
-0,45х = -94,5
х = -94,5 : (-0,45)
х = 210

Вся дорога = 210 км

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