Giúp mình với ạ ! Mình cần gấp 
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DD
13 tháng 2 2022
B7 chu vi mảnh vườn là 3,3 m
diện tích là \(\dfrac{8}{7}\)m vuông
13 tháng 2 2022
Bài 7:
Chu vi là:
\(\left(\dfrac{12}{5}+\dfrac{10}{21}\right)\cdot2=\dfrac{604}{105}\left(m\right)\)
Diện tích là:
\(\dfrac{12}{5}\cdot\dfrac{10}{21}=\dfrac{8}{7}\left(m^2\right)\)
NP
ai giup minh voi a minh can gap lam TvT 
2
DT
Đỗ Thanh Hải
CTVVIP
24 tháng 4 2021
4 has not been - broke
5 did you - was
6 have youy ever been
II
1 go
2 were
3 eats
7 does - won't worry
8 had played - would have won
9 will - do
10 were - would go
14 would have written
15 won't go
16 tries
17 spoke
19 finish - will go
20 see - ask
DT
Đỗ Thanh Hải
CTVVIP
24 tháng 4 2021
Rewrite
1 The man who doesn't work hard can't earn more money
3 If my friend and I had enough money, we would buy a house of our town
4 If the weather were better now, we could go for a walk
5 If I knew his addres, I would give it to you
6 If he worked slowly enough, he wouldn't make
7 If I were sent to proson, she would visit me
8 If I won a big prize in a lottery, I would give up my job
9 If the doctor weren't so late, he could see many patients
10 If tickets weren't expensive, we would visit them in Ha Noi
III
1 were
2 would visit
3 would give
NK
2
2 tháng 3 2022
a: =-3/4+1/2-1/13+3/13=-1/4+2/13=-13/52+8/52=-5/52
b: =10/11+1/11-1/8=1-1/8=7/8
c: =4(2,86+3,14)-30,05+9x0,75
=24-30,05+6,75
=0,7
2 tháng 3 2022
a: \(=\dfrac{1}{3}+\dfrac{1}{8}-\dfrac{3}{16}\cdot4=\dfrac{11}{24}-\dfrac{3}{64}=\dfrac{88}{192}-\dfrac{9}{192}=\dfrac{79}{192}\)
b: \(=\dfrac{5}{8}\cdot\left(-16\right)=-10\)
c: \(=\left(\dfrac{8}{5}+\dfrac{1}{3}\right):\dfrac{29}{5}-\dfrac{4}{81}\cdot9\)
\(=\dfrac{29}{15}\cdot\dfrac{5}{29}-\dfrac{4}{9}=\dfrac{1}{3}-\dfrac{4}{9}=-\dfrac{1}{9}\)
giup minh voi,minh can gap
24 tháng 10 2021
\(c,=4\cdot\left(-\dfrac{1}{8}\right)-2\cdot\dfrac{1}{4}-\dfrac{3}{2}+1=-\dfrac{1}{2}-\dfrac{1}{2}-\dfrac{3}{2}+1=-\dfrac{3}{2}\\ \left(5x+\dfrac{2}{3}\right)^2=\dfrac{1}{4}\Rightarrow\left[{}\begin{matrix}5x+\dfrac{2}{3}=\dfrac{1}{2}\\5x+\dfrac{2}{3}=-\dfrac{1}{2}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}5x=-\dfrac{1}{6}\\5x=-\dfrac{7}{6}\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-\dfrac{1}{30}\\x=-\dfrac{7}{30}\end{matrix}\right.\\ c,x:2=\left(-4\right):5\Rightarrow x=-\dfrac{4}{5}\cdot2=-\dfrac{8}{5}\)
TG
24 tháng 10 2023
I have been sleeping for 3 minutes
Tôi đã ngủ được 3 tiếng rồi
S+have been+Ving => làm gì đó được bao lâu/từ lúc nào
VT
4
LA
7 tháng 3 2022
dễ mà bạn
a)3x-18=0 à mà mik chx hc phương trình
3x=18+0 sorry bạn nhé
3x=18
x=18:3
x=6
vậy x=6
SS
7 tháng 3 2022
a)\(3x-18=0\)
\(\Leftrightarrow3x=18\)
\(\Leftrightarrow x=6\)
Vậy x=6
b)\(2x.\left(x-4\right)-3x+12=0\)
\(\Leftrightarrow2x.\left(x-4\right)-3\left(x-4\right)=0\)
\(\Leftrightarrow\left(2x-3\right).\left(x-4\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}2x-3=0\\x-4=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=\frac{3}{2}\\x=4\end{cases}}}\)
Vậy .......
c)\(\frac{x-1}{2}-\frac{x+3}{3}=x+1\)
\(\Leftrightarrow6.\left(\frac{x-1}{2}-\frac{x+3}{3}\right)=6.\left(x+1\right)\)
\(\Leftrightarrow3.\left(x-1\right)-2.\left(x+3\right)=6x+6\)
\(\Leftrightarrow3x-3-2x-6=6x+6\)
\(\Leftrightarrow3x-2x-6x=6+3+6\)
\(\Leftrightarrow-5x=15\)
\(\Leftrightarrow x=-3\)
Vậy x= -3
d)\(\frac{x-3}{x+3}-\frac{5}{3-x}=\frac{30}{x^2-9}\)
\(\Leftrightarrow\frac{x-3}{x+3}-\frac{-5}{x-3}=\frac{30}{\left(x+3\right).\left(x-3\right)}\)
\(\Leftrightarrow\frac{\left(x-3\right).\left(x-3\right)}{\left(x+3\right).\left(x-3\right)}-\frac{-5.\left(x+3\right)}{\left(x-3\right).\left(x+3\right)}=\frac{30}{\left(x-3\right).\left(x+3\right)}\)
\(\Leftrightarrow\left(x-3\right)^2-\left(-5\right).\left(x+3\right)=30\)
\(\Leftrightarrow x^2-6x+9-\left(-5x-15\right)=30\)
\(\Leftrightarrow x^2-6x+9+5x+15-30=0\)
\(\Leftrightarrow x^2-x-6=0\)
\(\Leftrightarrow x^2-3x+2x-6=0\)
\(\Leftrightarrow x.\left(x-3\right)+2.\left(x-3\right)=0\)
\(\Leftrightarrow\left(x+2\right).\left(x-3\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x+2=0\\x-3=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=-2\\x=3\end{cases}}}\)
Vậy......
MN
10 tháng 12 2021
Tuy giàu nhưng cô ấy ăn uống rất đơn giản, không cần nem công chả phương
1. How does she go to school?
2. We don't watch TV every night. (chắc vậy :)
3. He walks to work every day.
4. She finishes work at 5 o'clock.
5. When does he go to the cinema? (chắc vậy tiếp :)
6. i don't come from Canada.
7. she doesn't get up at 7 a.m.
8. She works at the bank.
9. How often does he write letter to Bob?
10. They don't wash their car once a month. (chắc vậy x3 :)
Mình ko chắc lắm nha!
1. Does she go to school by bike?
2. We don't watch television everynight.
3. He walks to work every day.
4. She finishes work at 5'clock
5.Does he go to the cinema on Fridays?
6. I don't come from Canada
7. She doesn't get up at 7 a.m.
8. She doesn't work at the bank
9. does he usually write letters to Bod
10. they don't wash their car once a month
good luck!