Mời các cao nhân bài 13 ạ
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How are you? I hope you are doing well at university these days. You haven't written to me about your examinations but I believe that you passed your exam easy.
Anyway, on December 30th 2021 will be my birthday. To celebrate my 35th birthday, I am going to hold a warm dinner at Manh Hoach restaurant near Luc Quan crossroad, Co Dong, Son Tay, Ha Noi at 6.00 in the evening of the 2nd next Sunday. I am going to invite all of my friends. I will be very eager to meet you in there
The dinner will start at 6 o clock, but you can come more earlier and we can go fishing at the lake. Bring your wife along with you too. Don't be late.
I hope you would accept my invitation.
Your sincerely,
Tham khảo ạ!
\(2H_2+O_2\rightarrow2H_2O\)
\(4Mg+O_2\rightarrow2Mg_2O\)
\(2Cu+O_2\rightarrow2CuO\)
\(2S+O_2\rightarrow2SO\)
\(4Al+3O_2\rightarrow2Al_2O_3\)
\(2C+O_2\rightarrow2CO\)
\(a,\left(-8,5\right)+16,35+\left(-4,5\right)-\left(-2,25\right)\\ =\left[\left(-8,5\right)+\left(-4,5\right)\right]+\left[16,35-\left(-2,25\right)\right]\\ =-13+18,6=5,6\\ b,5,63+\left(-2,75\right)-\left(-8,94\right)+9,06-15,25\\ =5,63-2,75+8,94+9,06-15,25\)
\(=5,63-\left(2,75+15,25\right)+\left(8,94+9,06\right)\\ =5,63-18+18\\ =5,63\)
a) (-8,5) + 16,35 + (-4,5) - (-2,25) = 5,6
b) 5,63 + (-2,75) - (-8,94) + 9,06 - 15,25 = 5,63
48 trang cuối chiếm
\(1-\dfrac{1}{3}-\dfrac{2}{5}=\dfrac{4}{15}\)
Quyển sách có số trang là:
\(48:\dfrac{4}{15}=180\left(trang\right)\)
Vậy ...
Gọi độ dài cạnh là a
Diện tích hình vuông là S=a^2
Độ dài bán kính hình tròn là a/2
Diện tích hình tròn là: (a/2)^2*3,14=a^2*3,14/4
Theo đề, ta có: a^2-a^2*3,14/4=0,215
=>a^2=1
=>a=1
=>Diện tích hình tròn là: 1^2*3,14/4=0,785cm2
.many beautiful cham towers can seen in Binh Dinh province by tourist
à thôi còn nhiều bài nên xin các cao nhân hãy nhanh nhanh giúp ạ
1 We should recycle plastic bags and jars
2 How can I get to the nearest bus stop?
3 We are going rafting so you should bring a towel
4 Because of feeling tired, I went to bed early
5 It is not difficult to recycle paper