giúp mình với mình đang vội :((((
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Bài 3.2:
Chièu rộng là 45*2/5=18cm
CHiều cao là 18*1/3=6cm
V=18*6*45=270*18=4860cm3
Bài 3.3:
Chiều dài là 40:2-8=20-8=12cm
V=5*8*12=5*96=480cm3
Bài 3,1
Diện tích xung quanh:
\(2\times0,9\times\left(1,8+1,2\right)=5,4\left(m^2\right)\)
Diện tích toàn phần:
\(5,4+2\times1,8\times1,2=9,72\left(m^2\right)\)
Bài 3,2
Diện tích xung quanh:
\(1,5\times1,5\times4=9\left(cm^2\right)\)
Diện tích toàn phần:
\(1,5\times1,5\times6=13,5\left(cm^2\right)\)
Bài 3.2
\(S_{XQ}=1.5^2\cdot4=9\left(cm^2\right)\)
\(S_{TP}=9\cdot1.5=13.5\left(cm^2\right)\)
1 Where are the picture which were on this wall
2 My father is the person who has great influence on my behavior
3 Do you like the flowers which I bought this morning?
4 All of us are interested in the man who is teaching us PE
5 What's the name of the girl who lent you this book?
6 I don't know the man who wrote lots of good books
7 The girl who has worked here for 5 days will leave me the message
8 All the man who are businessman attended the meeting
9 Do you know the lady who is presenting the topic
10 I haven't read the novel which was written by Nam cao
\(a,2\left|3x-1\right|+1=5\\ \Rightarrow2\left|3x-1\right|=5-1\\ \Rightarrow2\left|3x-1\right|=4\\ \Rightarrow\left|3x-1\right|=4:2\\ \Rightarrow\left|3x-1\right|=2\\ \Rightarrow\left[{}\begin{matrix}3x-1=2\\3x-1=-2\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}3x=3\\3x=-1\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=1\\x=-\dfrac{1}{3}\end{matrix}\right.\)
\(b,\left|\dfrac{x}{2}-1\right|=3\\ \Rightarrow\left[{}\begin{matrix}\dfrac{x}{2}-1=3\\\dfrac{x}{2}-1=-3\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}\dfrac{x}{2}=4\\\dfrac{x}{2}=-2\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=8\\x=-4\end{matrix}\right.\)
\(c,\left|-x+\dfrac{2}{5}\right|+\dfrac{1}{2}=3,5\\ \Rightarrow\left|-x+\dfrac{2}{5}\right|=3,5-\dfrac{1}{2}\\ \Rightarrow\left|-x+\dfrac{2}{5}\right|=3\\ \Rightarrow\left[{}\begin{matrix}-x+\dfrac{2}{5}=3\\-x+\dfrac{2}{5}=-3\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}-x=\dfrac{13}{5}\\-x=-\dfrac{17}{5}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=-\dfrac{13}{5}\\x=\dfrac{17}{5}\end{matrix}\right.\)
\(d,\left|x-\dfrac{1}{3}\right|=2\dfrac{3}{5}\\ \Rightarrow\left|x-\dfrac{1}{3}\right|=\dfrac{13}{5}\\ \Rightarrow\left[{}\begin{matrix}x-\dfrac{1}{3}=\dfrac{13}{5}\\x-\dfrac{1}{3}=-\dfrac{13}{5}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=\dfrac{13}{5}+\dfrac{1}{3}\\x=-\dfrac{13}{5}+\dfrac{1}{3}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}\dfrac{44}{15}\\x=-\dfrac{34}{15}\end{matrix}\right.\)
Olm chào em, em cần đăng rõ ràng nội dung câu hỏi để nhận sự trợ giúp tốt nhất cho tài khoản olm vip em nhé.
làm gì mà vội vậy, bạn phải ghi rõ câu hỏi ra