Giúp mình 2 bài này ik mình đang cần gấp
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![](https://rs.olm.vn/images/avt/0.png?1311)
1. I don't want to eat anything, I'm not hungry.
2. Thuy and her friends are skipping rope in the school yard now.
3. It's very kind for you to make friend with me
4. I'm going to introduce you to natural wonders in the world.
5. Our children are interested in reading books about history and geography.
![](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)
Bài 1:
a) \(R_{tđ}=R_1+R_2=7,5+15=22,5\left(\Omega\right)\)
b) \(I=I_1=I_2=0,3A\)
\(\left\{{}\begin{matrix}U=I.R_{tđ}=0,3.22,5=6,75\left(V\right)\\U_1=I_1.R_1=0,3.7,5=2,25\left(V\right)\\U_2=I_2.R_2=0,3.15=4,5\left(V\right)\end{matrix}\right.\)
Bài 2:
a) Điện trở tương đương:
\(R_{tđ}=R_1+R_2=3+6=9\left(\Omega\right)\)
b) \(I=I_1=I_2=\dfrac{U}{R_{tđ}}=\dfrac{9}{9}=1\left(A\right)\left(R_1ntR_2\right)\)
Hiệu điện thế giữa 2 đầu mỗi điện trở:
\(\left\{{}\begin{matrix}U_1=I_1.R_1=1.3=3\left(V\right)\\U_2=I_2.R_2=1.6=6\left(V\right)\end{matrix}\right.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2:
a: =(1+căn 3)^2-5
=4+2căn 3-5
=2căn 3-1
b: \(=\sqrt{\dfrac{125}{7}\cdot\dfrac{35}{81}}=\sqrt{\dfrac{625}{81}}=\dfrac{25}{9}\)
c: \(=\left(\sqrt{3}-1\right)\left(\sqrt{3}+1\right)-\sqrt{6}+\sqrt{2}\)
=2-căn 6+căn 2
3:
a: \(=\dfrac{2\sqrt{3}+3\sqrt{3}-\sqrt{3}}{\sqrt{3}}=2+3-1=5\)
b: \(=\dfrac{6\sqrt{2}+7\sqrt{2}-5\sqrt{2}}{\sqrt{2}}=13-5=8\)
c: \(=\dfrac{12-10+8}{2}=5\)
d: \(=\sqrt{\dfrac{1}{5}:5}-\sqrt{\dfrac{9}{5}:5}+\sqrt{5:5}\)
=1/5-3/5+1
=3/5
Who are you often meet on Saturday?
Why your father usually have beefsteak for his breakfast?
How many big beds in your bedroom?