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a) -) Mai doesn't plays badminton after school
?) Does Mai play badminton after school?
b) -) She doesn't you out at the moment
?) Does she you out at the moment?
c) -) We don't after have a picnic on weekend
?) Do you after have a picnic on weekend?
d) -) The student aren't sitting in class
?) Are student sitting in class?
e) -) I can't play giutar
?) Can you play giutar?
Bạn ơi đề bài đáng ra là chuyển các câu sau sang phủ định và nghi vấn chứ
phays=plays
A) Mai don't play badminton after school
Is Mai play badminton after school ?
B) She you out not at the moment
Are you she out at the moment ?
C) We not after have a picnic on weekend
Are we after have picnic on weekend ?
D) The student not are sitting in class
Is student sitting in class ?
E) I can't play giutar
Can I play giutar ?
1. She won't be happy
Will she be happy
2. My family does not often go for a picnic on the weekend
Does my family often go for a picnic on the weekend
1.She usually leaves home at seven o'clock.
2.Next week we will go camping.
3.I will wait for you outside the cinema.
Bài 6:
Xét ΔOAC vuông tại A và ΔOBD vuông tại B có
OA=OB
\(\widehat{AOC}=\widehat{BOD}\)(hai góc đối đỉnh)
Do đó: ΔOAC=ΔOBD
=>OC=OD
Bài 7:
a: Ta có: \(\widehat{DAB}+\widehat{BAC}+\widehat{CAE}=180^0\)
=>\(\widehat{DAB}+\widehat{CAE}+90^0=180^0\)
=>\(\widehat{DAB}+\widehat{CAE}=90^0\)
mà \(\widehat{DAB}+\widehat{DBA}=90^0\)
nên \(\widehat{DBA}=\widehat{CAE}\)
Xét ΔABD vuông tại A và D và ΔCAE vuông tại E có
AB=AC
\(\widehat{DBA}=\widehat{EAC}\)
Do đó: ΔABD=ΔCAE
b: ta có: ΔABD=ΔCAE
=>DB=AE và AD=CE
DB+CE=DA+AE=DE
\(2x=3y=5z\Rightarrow\frac{x}{\frac{1}{2}}=\frac{y}{\frac{1}{3}}=\frac{z}{\frac{1}{5}}\)
Áp dụng t/c dãy tỉ số = nhau ta có:
\(\frac{x}{\frac{1}{2}}=\frac{y}{\frac{1}{3}}=\frac{z}{\frac{1}{5}}=\frac{x+y+z}{\frac{1}{2}+\frac{1}{3}+\frac{1}{5}}=\frac{-33}{\frac{31}{30}}=-\frac{990}{31}\)
\(\frac{x}{\frac{1}{2}}=-\frac{990}{31}\Rightarrow x=-\frac{495}{31}\)
\(\frac{y}{\frac{1}{3}}=-\frac{990}{31}\Rightarrow y=-\frac{330}{31}\)
\(\frac{z}{\frac{1}{5}}=-\frac{990}{31}\Rightarrow z=-\frac{198}{31}\)
Vậy ...
Có: \(2x=3y=5z\)
=> \(\frac{2x}{30}=\frac{3y}{30}=\frac{5z}{30}\)
=> \(\frac{x}{15}=\frac{y}{10}=\frac{z}{6}\)
Áp dụng tc của dãy tỉ số bằng nhau ta có:
\(\frac{x}{15}=\frac{y}{10}=\frac{z}{6}=\frac{x+y+z}{15+10+6}=\frac{-33}{31}\)
=> \(\begin{cases}x=-\frac{495}{31}\\y=-\frac{330}{31}\\z=-\frac{198}{31}\end{cases}\)
a) 2x = 3y = 5z
=> \(\frac{x}{3}=\frac{y}{5}=\frac{z}{2}\)
Áp dụng tính chất dãy tỉ số = nhau , ta có :
\(\frac{x}{3}=\frac{y}{5}=\frac{z}{2}=\frac{x+y+z}{3+5+2}=\frac{-33}{10}\)
=> x = 3.(-33/10) = -99/10
y = 5.(-33/10) = -165/10
z = 2.(-33/10) = -66/10
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Mik ko cs thoi gian nen chi viet nhu the nay thoi nha
a) Mai plays badminton after school
( - ) Mai doesn't play badminton after school .
( ? ) Does Mai play badminton after school ?
b) She you out at the moment
( - ) She doesn't you out at the moment
( ? ) Does she you out at the moment
c) we often have a picnic on weekend
( - ) we don't often have a picnic on weekend
( ? ) Do you often have a picnic on weekend
d) The students are sitting in class
( - ) The students aren't sitting in class
( ? ) Are the students sitting in class
e) I can play giutar
( - ) I can't play giutar
( ? ) Can you play giutar
bạn ơi đề bài phải là chuyển các câu sau sang phủ định và nghi vấn , khẳng định là câu bạn đặt ra ế
tk mình nhá
mình ko hiểu đề bài ( đáng ra là phủ định) và câu 2
1. Mai doesn't play badminton after school
2.
3. We doesn't often have a picnic on weekend.
4. The student aren't sitting in class.
5. I can't play guitar.