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NL
3
11 tháng 10 2018
125255 + 546854 + 2 = ?
125255 + 546854 + 2 = 67211
Hok tốt
XD
8 tháng 10 2017
I.Make question for with bold words(Đặt câu hỏi với từ in đậm):
1.It's ten to ten.
..........WHAT TIME IS IT?.........
2.The train is going to Nha Trang.
.......WHERE IS THE TRAIN GOING TO?........
3.Mr.Nam goes to work by car every day.
.........HOW DOES MR NAM GO TO WORK EVERYDAY?........
4.Lan is listening to music at the moment.
........WHAT IS LAN DOING AT THE MOMENT?......
II.Write the comparison sentences(Viết câu so sánh):
Example: 0.Hue / small / Hanoi Ans: Hue is smaller than Hanoi.
1.Lan / young / Hoa
Ans: LAN IS YOUNGER THAN HOA.
2.My uncle / old / my aunt
Ans: MY UNCLE IS OLDER THAN MY AUNT.
3.This ruler / long / that one
Ans: THIS RULER IS LONGER THAN THAT ONE.
4.This room / large / my room
Ans: THIS ROOM IS LARGER THAN MY ROOM.
TD
8 tháng 10 2017
I.Make question for with bold words(Đặt câu hỏi với từ in đậm):
1.It's ten to ten.
What time is it?
2.The train is going to Nha Trang.
Where is the train going to?
3.Mr.Nam goes to work by car every day.
How does Mr.Nam go to work every day?
4.Lan is listening to music at the moment.
What is Lan doing at the moment?
II.Write the comparison sentences(Viết câu so sánh):
Example: 0.Hue / small / Hanoi Ans: Hue is smaller than Hanoi.
1.Lan / young / Hoa Ans: Lan is younger than Hoa
2.My uncle / old / my aunt Ans: My uncle is older than my aunt
3.This ruler / long / that one Ans: This ruler is longer than that one
4.This room / large / my room Ans:This room is larger than my room
3 tháng 1 2019
nhân từng hạng tử của giả thiết với 2 rồi cộng và trừ từng cái một là ra còn gì nx
Trình bày dài lắm
KK
3 tháng 1 2019
Ta có : \(\frac{x}{a+2b+c}=\frac{y}{2a+b-c}=\frac{z}{4a-4b+c}\)
=> \(\frac{a+2b+c}{x}=\frac{2a+b-c}{y}=\frac{4a-4b+c}{z}\)
=> \(\frac{a+2b+c}{x}=\frac{2\left(2a+b-c\right)}{2y}=\frac{4a-4b+c}{z}=\frac{a}{x+2y+z}\)(1)
=> \(\frac{2\left(a+2b+c\right)}{2x}=\frac{2a+b-c}{y}=\frac{4a+4b+c}{z}=\frac{b}{2x+y-z}\)(2)
=> \(\frac{4\left(a+2b+c\right)}{4x}=\frac{4\left(2a+b-c\right)}{4y}=\frac{4a-4b+c}{z}=\frac{c}{4x-4y+z}\)(3)
Từ (1);(2);(3) suy ra \(\frac{a}{x+2y+z}=\frac{b}{2x+y-z}=\frac{c}{4x-4b+z}\)
LB
7 tháng 12 2021
Hello, I am Hoang Anh ! And you ?
Yeah ! I am Chau, 11 Years old, I am a student at class 6D1.
31 tháng 1
Gọi giá của 1 cái bàn và 1 cái ghế lần lượt là a(đô la) và b(đô la)
(Điều kiện: a>0 và b>0)
Giá của 1 cái bàn và 3 cái ghế là 765 đô la nên ta có: a+3b=765(1)
Giá của 2 cái bàn và 4 cái ghế là 1370 đô la nên ta có:
2a+4b=1370
=>a+2b=685(2)
Từ (1) và (2) ta có hệ phương trình:
\(\left\{{}\begin{matrix}a+3b=765\\a+2b=685\end{matrix}\right.\)
=>\(\left\{{}\begin{matrix}a+3b-a-2b=80\\a+2b=685\end{matrix}\right.\)
=>\(\left\{{}\begin{matrix}b=80\\a=525\end{matrix}\right.\)
Giá của 8 cái ghế là 80*8=640 đô la
7 tháng 5 2022
1. If someone ______ into the store, smile and say, “May I help you?”
A. comes B. came C. will come D. would come
2. If you ______ all of my questions, I ______ anything to help you.
A. don’t answer / can’t do B. didn’t answer / won’t do
C. wouldn’t answer / can’t do D. wouldn’t answer / couldn’t do
3. “Here’s my phone number.” – “Thanks, I ______ you a call if I ______ some help.”
A. will give / will need B. would give / needed
C. give / need D. will give / need
4. The teacher was absent today, so the class was canceled. If she ______ absent again tomorrow, class ______ tomorrow, too.
A. is / will cancel B. is / will be canceled
C. was / would be canceled D. was / would cancel
5. ______ there are some more ideas, we can end the meeting now.
A. Unless B. If C. As if D. In case
6. If anyone ______, ______ him I ______ back at 9 o’clock.
A. calls / tell / will be B. called / telling / would be
C. is calling / tells / am D. will call / to tell / am
7. ______ more information, please telephone our main office.
A. If you will need B. Should you need
C. You should need D. If you needed
8. If Jack refuses to help, we ______ manage without him.
A. have to B. will have to C. had to D. are having to
9. You will get a good seat if you ______ first.
A. come B. came C. have come D. will come
10. We’ll be late unless we ______ now.
A. leave B. don’t leave C. had left D. have left
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bn nha