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BH
1
DT
Đỗ Thanh Hải
CTVVIP
8 tháng 10 2021
1 How long do you live in HN
2 How often did you go to the movies
3 What did Mrs Robinson buy
4 When was your father in Nghe An
5 How do they go to school
6 Why didn't she go to class
7 Who left home at 7o'clock yesterday
8 What subject does he study in the high school
9 What is your favorite hobby
10 How far is it
giúp mình với mn mình đang cần gấp
HH
6 tháng 11 2021
1. commuity service is work done by a person or group of people that benifits others
2. it is often done near the area where you live , so your own community gets the benifits work
3. no
4. community service can help many difference group of people , even animal and the inviroment
5. community service is often organized through a local group , such as a place of worship , school , or non- profit organization , or you can start your own community service project .
6.community service can even involve raising funds by donating used goods or selling used goods like clothing
N
4 tháng 12 2021
\(2cm^3=2\cdot10^{-6}m^3\)
\(V_c=V-V_n=2\cdot10^{-6}-\left(2\cdot10^{-6}\cdot\dfrac{2}{5}\right)=1,2\cdot10^{-6}m^3\)
\(\Rightarrow F_A=dV_c=10000\cdot1,2\cdot10^{-6}=0,012\left(N\right)\)
*Uhm, không biết do đề sai hay do mình tính sai, nhưng khi tính ra khối lượng của vật thì số khá "ĐẸP" :<*
1
28 tháng 2 2022
Gọi chiều rộng là x
Chiều dài là 17-x
Theo đề, ta có: \(\left(x+2\right)\left(20-x\right)=x\left(17-x\right)+45\)
\(\Leftrightarrow20x-x^2+40-2x=17x-x^2+45\)
=>18x+40=17x+45
=>x=5
Vậy: Chiều rộng là 5m
Chiều dài là 12m
a/ \(\left(x-3\right)^2+6\left(x-3\right)+9\)
\(=\left(x-3\right)^2+2.\left(x-3\right).3+3^2\)
\(=\left(x-3+3\right)^2=x^2\)
==========
b/ \(\left(x+2021\right)^2+2\left(x+2021\right)\left(x-2021\right)+\left(x-2021\right)^2\)
\(=\left(x+2021+x-2021\right)^2=4x^2\)
===========
c/ \(2022^2-2.2021.2022+2021^2\)
\(=\left(2022-2021\right)^2=1\)
==========
d/ \(\left(x+44\right)^2-88\left(x+44\right)+1936\)
\(=\left(x+44\right)^2-2.\left(x+44\right).44+44^2\)
\(=\left(x+44-44\right)^2=x^2\)
d: Ta có: \(\left(x+44\right)^2-88\left(x+44\right)+1936\)
\(=\left(x+44-44\right)^2\)
\(=x^2\)