1 Her mother is not as hospitable as her

2 Hung is fond of swimming in the summer

3 Let's travel abroad

4 There are 4 chairs in my room

5 Don't forget to drink more water

6 Minh is the most intelligent student in my class

1. The ao dai consists of a lonk silk tunic that is lit on the sides and worn over loose pants.

2. What is your favorite type of clothing for special occasion?

3. The word jeans comes from a kind of material that was made in Europe.

4. We haven’t seen Thu since she moved to Hue to live with her husband.

5. The ao dai  has been modernized for decades.

6. The last time Miss Nhan wore the ao dai  was five years ago.

7. Nam will have to be taught how to design sports clothes.

8. How long is it since you last visited a museum?

9. The ao dai has been mentioned in poems, novels and songs for over a century.

10. What kinds of clothing are often worn at parties?

Dạ em cám ơn anh nhiều ạ 

Nam's failure in the one-period test depressed him 

Dạ em cám ơn anh nhiều ạ 

a/ \(\left(P\right):3\left(x-0\right)+0\left(y-2\right)+1\left(z+5\right)=0\Rightarrow\left(P\right):3x+z+5=0\)

b/\(\overrightarrow{AB}\left(2;4;-9\right);\overrightarrow{AC}\left(4;0;-7\right)\)

 \(\overrightarrow{n_{\left(P\right)}}=\left[\overrightarrow{AB},\overrightarrow{AC}\right]=\left(4.\left(-7\right)-0.\left(-9\right);\left(-9\right).4-\left(-7\right).2;2.0-4.4\right)=\left(-28;-22;-16\right)\)

\(\Rightarrow\left(P\right):-28\left(x-0\right)-22\left(y-1\right)-16\left(z-7\right)=0\Rightarrow\left(P\right):28x+22y+16z-134=0\)

c/ Truc Oy di qua O(0;0;0) va co vtcp \(\overrightarrow{j}\left(0;1;0\right)\)

\(\overrightarrow{OD}\left(3;-6;2\right)\)

\(\Rightarrow\overrightarrow{n_{\left(P\right)}}=\left[\overrightarrow{j};\overrightarrow{OD}\right]=\left(2;0;-3\right)\)

\(\Rightarrow\left(P\right):2\left(x-0\right)+0\left(y-1\right)-3\left(z-0\right)=0\Rightarrow\left(P\right):2x-3z=0\)

d/ \(\overrightarrow{Oz}\left(0;0;1\right)\)

\(\overrightarrow{DE}\left(5;-2;-7\right)\)

\(\Rightarrow\overrightarrow{n_{\left(P\right)}}=\left[\overrightarrow{Oz};\overrightarrow{DE}\right]=\left(2;5;0\right)\)

\(\Rightarrow\left(P\right):2\left(x-0\right)+5\left(y-0\right)+0\left(z-1\right)=0\Rightarrow\left(P\right):2x+5y=0\)

e/ \(\overrightarrow{n_{Oyz}}=\overrightarrow{n_{\left(P\right)}}=\left(1;0;0\right)\)

\(\Rightarrow\left(P\right):1\left(x-3\right)=0\Rightarrow\left(P\right):x-3=0\)

f/ Cách làm giống câu b

g/ \(\overrightarrow{HI}=\overrightarrow{IK}\Rightarrow\left\{{}\begin{matrix}x_I=\dfrac{3-1}{2}=1\\y_I=\dfrac{-1+5}{2}=2\\z_1=\dfrac{2-4}{2}=-1\end{matrix}\right.\Rightarrow I\left(1;2;-1\right)\)

\(\overrightarrow{n_{\left(P\right)}}=\overrightarrow{HK}\left(-4;6;-6\right)\)

\(\Rightarrow\left(P\right):-4\left(x-1\right)+6\left(y-2\right)-6\left(z+1\right)=0\Rightarrow\left(P\right):-4x+6y-6z+2=0\)

P/s: Bạn tính toán lại kết quả hộ mình nhé !

x : 4 + x = 3,75

\(x\)x\(\frac{1}{4}\) + \(x=3,75\)

\(x\)x\(\left(\frac{1}{4}+1\right)=\frac{375}{100}\)

\(x\)x\(\frac{5}{4}=\frac{15}{4}\)

\(x=\frac{15}{4}:\frac{5}{4}\)

\(x=\frac{15}{4}\)x\(\frac{4}{5}\)

\(x=3\)

\(\frac{x}{4}+x=3.75\)

\(x\left(\frac{1}{4}+1\right)=\frac{15}{4}\)

\(x\cdot\frac{5}{4}=\frac{15}{4}\)

\(x=\frac{15}{4}:\frac{5}{4}=3\)