1. Going in the rain is interesting.

2. Don't forget to learn by heart new words.

3. If he doesn't apologize me, I won't forgive him.

4. My grandmother is the most helpful (person) in my village.

5. What is the price of that hat?

6. Your book is different from my book.

a: MNPQ là hình bình hành

=>MQ//NP

=>MQ//IP

Xét tứ giác MIPQ có IP//MQ

nên MIPQ là hình thang

b: ΔMNP vuông cân tại N

=>MN=NP và \(\widehat{MNP}=90^0\)

Hình bình hành MNPQ có \(\widehat{MNP}=90^0\)

nên MNPQ là hình chữ nhật

=>\(\widehat{Q}=\widehat{P}=90^0\)

Xét ΔMNI vuông tại N có \(sinNMI=\dfrac{NI}{MN}=\dfrac{2}{3}\)

nên \(\widehat{NMI}\simeq42^0\)

\(\widehat{NMI}+\widehat{QMI}=\widehat{NMQ}=90^0\)

=>\(\widehat{QMI}+42^0=90^0\)

=>\(\widehat{QMI}=48^0\)

IP//MQ

=>\(\widehat{QMI}+\widehat{MIP}=180^0\)(hai góc trong cùng phía)

=>\(\widehat{MIP}+48^0=180^0\)

=>\(\widehat{MIP}=132^0\)

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\(\frac{4}{5}\)

\(x=3\)

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

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

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

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

x :4 +x=3,75

=>0,25x+x=3,75

=>125x=3,75

=>x=3,75:1,25

=>x=3

chúc em hok tốt

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

$Zn + H_2SO_4 \to ZnSO_4 + H_2$
$n_{H_2} = n_{Zn} = \dfrac{19,5}{65} = 0,3(mol)$
$V_{H_2} = 0,3.22,4 = 6,72(lít)$

$2Al + 3H_2SO_4 \to Al_2(SO_4)_3 + 3H_2$
Theo PTHH : 

$n_{Al} = \dfrac{2}{3}n_{H_2} = 0,2(mol)$
$m_{Al} = 0,2.27 = 5,4(gam)$

\(m_{ct}=\dfrac{4.100}{100}=4\left(g\right)\)

\(n_{NaOH}=\dfrac{4}{40}=0,1\left(mol\right)\)

Pt : \(NaOH+HCl\rightarrow NaCl+H_2O|\)

           1            1            1            1

         0,1          0,1

\(n_{HCl}=\dfrac{0,1.1}{1}=0,1\left(mol\right)\)

20ml = 0,02l

\(C_{M_{ddHCl}}=\dfrac{0,1}{0,02}=5\left(M\right)\)

 Chúc bạn học tốt

x=22