Giúp với ạ, đang cần gấp ạ
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Những câu hỏi liên quan
20 tháng 10 2021
Bài 3:
a: Ta có: \(3x^2+10x+2=10\)
\(\Leftrightarrow3x^2+10x-8=0\)
\(\Leftrightarrow\left(x+4\right)\left(3x-2\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-4\\x=\dfrac{2}{3}\end{matrix}\right.\)
NU
1
12 tháng 3 2023
mở bài là giới thiệu về cụ nha mn em viết lộn ạ
thân bài là đóng góp ạ
DT
Đỗ Thanh Hải
CTVVIP
5 tháng 11 2021
1 It takes 2 hours to get there
2 I usually have lessons in the morning so I often go home late at 11.20
3 I study hard at school because I don't have time to study at home
4 I help my parents with work on the farm in the afternoon
5 In the summer my parents often take me to Vung Tau
6 It was a great time because I spent all the time there going swimming
7 Although life in the country is still hard but I love it very much
TM
8 tháng 12 2021
Bài 1:
Ta có số tiền tủ lạnh sau khi giảm lần 1 là: \(15000000-15000000.20\%=12000000đ\)
Số tiền tủ lạnh sau khi giảm lần 2 là: \(12000000-12000000.5\%=11400000đ\)
Số tiền cửa hàng thu được sau khi bán 5 cái tủ lạnh: \(11400000.5=57000000đ\)
NN
1
KY
13 tháng 12 2021
1. When the Bedford River Festival is held in Bedford, England, thousands of European visitors come.
2. Because the Glastonbury Festival is a festival of contemporary performing arts, it has performances of music, dance, theatre, and other arts.
3. The funniest part of the Glastonbury Festival is walking through the mud in your boots while you are camping with all of your friends.
4. Vietnamese families believe they will have a prosperous year ahead if the first person to enter the house is generous and kind-hearted.
5. Although/ Even though the Glastonbury Festival is loud and wild, you should not miss this exciting music festival.
DT
7 tháng 1 2022
ta có:
\(\dfrac{P_1}{P}=\dfrac{S_1}{S}=\dfrac{\pi R^2}{\dfrac{4}{\pi R^2}}=\dfrac{1}{4}\)
\(\dfrac{P_2}{P}=\dfrac{S-2S_1}{S}=\dfrac{S-\dfrac{S}{2}}{S}=\dfrac{1}{2}\)
<=>\(\dfrac{P_1}{P_2}=\dfrac{1}{\dfrac{4}{\dfrac{1}{2}}}=\dfrac{1}{2}\)
ta tiếp có hệ pt:
\(\left\{{}\begin{matrix}\dfrac{OO_2}{OO_1}=\dfrac{P_1}{P_2}=\dfrac{1}{2}\\OO_2+OO_1=\dfrac{R}{2}\end{matrix}\right.\)
ra được :
\(OO_1=\dfrac{R}{3}\) và \(OO_2=\dfrac{R}{6}\)
25 - has believed
26- has losen
27- has been
28- haven't seen / were
29- has just gone/ aren't coming
30- hasn't finished / moved