Giúp em với đc ko
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1 will you be
2 try
3 transmitting
4 Will - leave
5 doesn't go
6 has
7 collecting
8 will pick
9 to study
10 was
11 to decide
12 is going to rain
13 couldn't
14 causes
15 didn't have
16 crossing
17 to say
18 swimming
19 are
20 Do - eat
Hình 1:
Chu vi của hình trên là:
\(\dfrac{1}{2}\times8\times3,14=12,56\left(cm\right).\)
Hình 2:
Chu vi của hình trên là:
\(\dfrac{1}{4}\times2\times6\times3,14=9,42\left(cm\right).\)
a: 12h: 0 độ
10h: 60 đọ
6h: 180 độ
5h: 150 độ
b:
a: góc nhọn: góc yMz; góc tMz
b: góc vuông: góc yMt, góc xMt
c: góc tù: góc xMz
d: góc bẹt: góc xMy
\(\Delta=\left(2m-1\right)^2-4\left(3m-4\right)=4m^2-16m+17=4\left(m-2\right)^2+1>0;\forall m\)
\(\Rightarrow\) Pt đã cho luôn có 2 nghiệm pb với mọi m
b.
Để biểu thức đề bài xác định \(\Rightarrow x_1;x_2\ne1\Leftrightarrow1+2m-1+3m-4\ne0\Rightarrow m\ne\dfrac{4}{5}\)
Khi đó theo hệ thức Viet: \(\left\{{}\begin{matrix}x_1+x_2=-2m+1\\x_1x_2=3m-4\end{matrix}\right.\)
\(\dfrac{x_1^2}{1-x_1}+\dfrac{x_2^2}{1-x_2}=2\Leftrightarrow\dfrac{x_1^2-x_1^2x_2+x_2^2-x_1x_2^2}{\left(1-x_1\right)\left(1-x_2\right)}=2\)
\(\Leftrightarrow\dfrac{\left(x_1+x_2\right)^2-2x_1x_2-x_1x_2\left(x_1+x_2\right)}{x_1x_2-\left(x_1+x_2\right)+1}=2\)
\(\Leftrightarrow\dfrac{\left(-2m+1\right)^2-2\left(3m-4\right)-\left(3m-4\right)\left(-2m+1\right)}{3m-4-\left(-2m+1\right)+1}=2\)
\(\Leftrightarrow\dfrac{10m^2-21m+13}{5m-4}=2\)
\(\Rightarrow10m^2-21m+13=10m-8\)
\(\Leftrightarrow10m^2-31m+21=0\Rightarrow\left[{}\begin{matrix}m=1\\m=\dfrac{21}{10}\end{matrix}\right.\)
1 outside
2 happy
3 on
4 bike
5 hand phone
6 university
7 emigrated
8 Travelling
9out
10 Where
11
12 furniture
13 successfully
14 In 1876
15 play tennis
1 C
2 B
3 A
4 C
5 C
6 D
7 D
8 C
9 C
10 C
11 C
12 D
13 A
14 B
15 A
16 C
17 B
18 B
19 B
20 A
II
1 D
1. Mrs.Parker asked her children not to stay up late tonight.
2. He told Meg not to be late for the meeting.
3. My mom told us not to play with these things in the kitchen.
4. I requested him not to put his things here.
5. Mary asked them not to touch her paper on the desk.
6. The safeguard advised the boys not to swim too far.
7. I asked her not to make noise in class.