mik cần gấp ạ
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![](https://rs.olm.vn/images/avt/0.png?1311)
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1.A
2.A
3.B
4.C
5.B
6.C
7.A
8.A
9.B
10.A
11.B
12.A
13.C
14.B
15.B
16.A
17.A
18.A
19.A
20.C
![](https://rs.olm.vn/images/avt/0.png?1311)
1 is explained
2 was stolen
3 will be opened
4 is being closed
5 is going to be built
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
1 are
2 am
3 is
4 are
5 are
6 are
7 is
8 is
9 is
10 are
IV
1 is writing
2 are losing
3 is having
4 is staying
5 am not lying
6 is always using
7 are having
8 Are you playing
9 are not touching
10 Is - listening
11 Is- winning
12 am not staying
13 is not working
14 is not reading
15 isn't raining
16 am not listening
17 Are they making
18 Are you doing
19 Is - sitting
20 is - doing
21 are-putting
22 are-wearing
23 is-studying
2, am
3, is
4,are
5,are
6,are
7,is
8,is
9,is
10,are
IV
1,2,7 OK
3,is having
4,has stayed
5,am not lying
6,always uses
8,Are-playing
9,not to touch
10,Is-listening
11,Are-winning
12,am not staying
13,isn't working
14,isn't reading
15,isn't raining
16,am not listening
17,Are-making
18,Are-doing
19,Is-sitting
20,is-doing
21,do-putting
22,do-wear
23,is-studying
![](https://rs.olm.vn/images/avt/0.png?1311)
a. f(\(\dfrac{-1}{2}\)) = \(4.\left(\dfrac{-1}{2}\right)^2+3.\left(\dfrac{-1}{2}\right)-2\)
= \(4.\dfrac{1}{4}-\left(\dfrac{-3}{2}\right)-\dfrac{4}{2}\)
= \(\dfrac{2}{2}+\dfrac{3}{2}-\dfrac{4}{2}\)
= \(\dfrac{1}{2}\)
Bài 5:
Nếu \(p=3\)dễ thấy thỏa mãn.
Nếu \(p\ne3\): khi đó \(p=3k+1\)hoặc \(p=3k+2\)(\(k\inℕ\))
Với \(p=3k+1\): \(p+8=3k+1+8=3k+9⋮3\)mà \(p+8>3\)nên \(p+8\)là hợp số.
Với \(p=3k+2\): \(p+10=3k+2+10=3k+12⋮3\)mà \(p+10>3\)nên \(p+10\)là hợp số.
Vậy \(p=3\).
Bài 4:
a) Tổng diện tích tầng 1 của ngôi nhà là:
\(10\times6=60\left(m^2\right)\)
b) Độ dài cạnh còn lại là:
\(12\div3=4\left(m\right)\)
c) Tổng diện tích phòng khách và phòng ăn là:
\(\left(10-2-3\right)\times6=30\left(m^2\right)\)
d) Diện tích khu vực cầu thang là:
\(3\times2=6\left(m^2\right)\)
Diện tích cần lát là:
\(60-6=54\left(m^2\right)\)
Đổi: \(100cm=1m\).
Diện tích mỗi viên gạch là:
\(1\times1=1\left(m^2\right)\)
Phải dùng số viên gạch tất cả là:
\(54\div1=54\)(viên)