М
Молодежь
К
Компьютеры-и-электроника
Д
Дом-и-сад
С
Стиль-и-уход-за-собой
П
Праздники-и-традиции
Т
Транспорт
П
Путешествия
С
Семейная-жизнь
Ф
Философия-и-религия
Б
Без категории
М
Мир-работы
Х
Хобби-и-рукоделие
И
Искусство-и-развлечения
В
Взаимоотношения
З
Здоровье
К
Кулинария-и-гостеприимство
Ф
Финансы-и-бизнес
П
Питомцы-и-животные
О
Образование
О
Образование-и-коммуникации
yuliana080704
yuliana080704
30.03.2021 09:16 •  Алгебра

За 3 3/4 часа поезд расстояние 330 км.какое расстояние пройдет поезд за 7,5 часов,если будет идти с той же скоростью?

👇
Ответ:
Лиза200111111
Лиза200111111
30.03.2021
330 делим на 3 3/4 равно 88 км/ч
88 умножить на 7,5 равно 660 км за 7,5часов
4,8(21 оценок)
Открыть все ответы
Ответ:
nikitaaleksandrov
nikitaaleksandrov
30.03.2021

阿迪爾汗

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

4,4(29 оценок)
Ответ:
Kirillastrovskiy
Kirillastrovskiy
30.03.2021

|x^2 - 6x + 1| = x^2 - 9

 

Раскроем модуль, получим 2 системы:

 

1) x^2-6x+1≥0

x^2-6x+1=x^2-9

 

2) x^2-6x+1<0

-(x^2-6x+1)=x^2 -9

 

(1) x^2-6x+1≥0 ⇔ x∈ (-∞; 3-√8] ⋃[3+√8; +∞) 

D=36-4=32

√D=√32 =2√8 

x1=(6+2√8)/2 = 3+√8 ≈ 5,8  

x2=(6-2√8)/2 = 3-√8 ≈ 0,17

 

x=5/3 = 1, (6) ⇒не входит  в x∈ (-∞; 3-√8] ⋃[3+√8; +∞)

 

2) x^2-6x+1<0 ⇔ x∈(3-√8;  3+√8)

D=36-4=32

√D=√32 =2√8 

x1=(6+2√8)/2 = 3+√8 ≈ 5,8  

x2=(6-2√8)/2 = 3-√8 ≈ 0,17

 

-(x^2-6x+1)=x^2 -9

-x^2+6x-1-x^2+9=0

x^2-3x-4=0

D=9+16=25=5^2

x1=(3+5)/2 = 8/2 = 4⇒∈ (3-√8;  3+√8)

x2=(3-5)/2 = -2/2 = -1⇒∉ (3-√8;  3+√8)

 

 

x=4

 

 

 

4,7(94 оценок)
Это интересно:
Новые ответы от MOGZ: Алгебра
logo
Вход Регистрация
Что ты хочешь узнать?
Спроси Mozg
Открыть лучший ответ