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
\(c,=4\cdot\left(-\dfrac{1}{8}\right)-2\cdot\dfrac{1}{4}-\dfrac{3}{2}+1=-\dfrac{1}{2}-\dfrac{1}{2}-\dfrac{3}{2}+1=-\dfrac{3}{2}\\ \left(5x+\dfrac{2}{3}\right)^2=\dfrac{1}{4}\Rightarrow\left[{}\begin{matrix}5x+\dfrac{2}{3}=\dfrac{1}{2}\\5x+\dfrac{2}{3}=-\dfrac{1}{2}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}5x=-\dfrac{1}{6}\\5x=-\dfrac{7}{6}\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-\dfrac{1}{30}\\x=-\dfrac{7}{30}\end{matrix}\right.\\ c,x:2=\left(-4\right):5\Rightarrow x=-\dfrac{4}{5}\cdot2=-\dfrac{8}{5}\)
L
1
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
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......
NP
2
MN
10 tháng 12 2021
Tuy giàu nhưng cô ấy ăn uống rất đơn giản, không cần nem công chả phương
We need to protect animals and forests
Hydroelectric dams provide power for industries and homes
The invitations were sent a fortnight before the weeding
The problem cannot be solved without the goverment's help
Were you invited to their wedding
tờ đầu bạn ghi đề xún dưới mik làm cho nhe
Đây bn