mik nghĩ là 5 = 1

học tốt

kb nhé, vì 1 = 5 rồi thì, 5 = 1 chứ bằng mấy nữa

Chị nghĩ là bằng 25.Nếu đúng nhớ k cho chị nha.

nhanh lên

4 . 3 . 6 . 5 . 9

=12 . 30 . 9

= 360 . 9

= 3240

Hk tốt

1 người làm xong công việc hết số giờ là

8*20*15=2400<giờ>

20 người làm 1 ngày hết số giờ là

20*10=200<giờ>

20 ngươi làm hềt số giờ là

2400:200=12<ngày>

dáp số:12 ngày

1 người làm xong công vịêc hết số giờ là

15*20*8=2400<giờ>

20 người làm hết số ngày là

Kb đi. nhưng mk hết lượt ròi.

Dc tặng quá j

5 giờ 20 phút= \(\frac{16}{3}\) giờ

Đổi 5 giờ 20 phút = ... giờ

 DDooir :

5 giờ 20 phút = 5,333....giờ

5 giờ 20 phút = \(\frac{16}{3}\)giờ

\(\left(x-3\right)\left(x+5\right)=0\)

\(\Rightarrow\orbr{\begin{cases}x-3=0\\x+5=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=3\\x=-5\end{cases}}\)

(x-3)x(x+5)=0

\(\Rightarrow\orbr{\begin{cases}x-3=0\\x+5=0\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}x=0+3\\x=0-5\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}x=3\\x=-5\end{cases}}\)

Vậy \(\orbr{\begin{cases}x=3\\x=-5\end{cases}}\)

có ai kb với tui hông

tui cx đag cô đơn nè

Hi bernice, My name 's Linh, i'm from Viet Nam,I still study english as well, exactly about 7 months ago. At the first time, when i speak english with foreigner , you know, my heart seem to be broken and felling panic.... And i think we must keep our passion as well as don't be scared and worry.... Of course, day by day step by step, we 'll improve a lot .Okie right?

Today I would to talk about myself (or I am glad to introduce myself). I am Lan. I was born and grew up in a poor village but it is very peaceful. People here are very kind and friendly. And you know I love my village so much because there is my family there. My family has four people: my father my mother my older sister and I. My father is an engineer. He works for a good company in Hanoi. My mother is a teacher. She teaches me so much. My older sister is a student. We have a lot same points. She s reading comic books fishing collecting and I do too. Her enjoy color is red but I blue. She taught me how to live in a university environment how to make acquaintances with anyone and so on and I thank her for those. Thanks to her teaching I know much more and have so many friends. I always promise myself to try to study well in order to my family can be proud of me.