giúp với ạ,cần rấttt gấpp.hứa tick
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1/ went
2/ prepared
3/ took
4/ played
5/ watched
6/ danced
7/ rained
Bài 4:
a) \(x+xy-3y=4\)
\(\Leftrightarrow x-3+y\left(x-3\right)=1\)
\(\Leftrightarrow\left(x+y\right)\left(x-3\right)=1\)
mà \(x.y\)là số nguyên nên ta có bảng giá trị:
x+y | 1 | -1 |
x-3 | 1 | -1 |
x | 4 | 2 |
y | -3 | -3 |
b) \(BCNN\left(6,7\right)=42\)nên \(BC\left(6,7\right)=B\left(42\right)\).
\(200< 6k< 2000\Rightarrow33< k< 334\)
suy ra có \(334-33-1=300\)giá trị của \(x\)là bội của \(6\)mà \(200< x< 2000\).
\(200< 7l< 2000\Rightarrow28< l< 286\)
suy ra có \(286-28-1=257\)giá trị của \(x\)là bội của \(7\)mà \(200< x< 2000\).
\(200< 42m< 2000\Leftrightarrow4< m< 48\)
suy ra có \(48-4-1=43\)giá trị của \(x\)là bội của \(42\)mà \(200< x< 2000\)
Số giá trị của \(x\)thỏa mãn ycbt là: \(300+257-43=514\)(số)
you didn't watch a film
Did you watch a film?
What did you watch?
b) Did they lock the door?
c) Did she open her present?
d) Did he carry the boxes?
e) Did you call your best friend?
f) Did she play volleyball?
g) Did your brother study History?
h) Did you wait for the bus?
i) DId he listen to music last night?
j) Did they help their mother?
did they lock the door
Did she open the present
Did he carrie the boxes
Did you call your bestfriend
1. This book was interesting. It wasn't boring.
2. They were Japanese. They weren't American.
3. We were in the café. We weren't at school.
4. Tweetie was a bird. He wasn't a parrot
1. Where were you yesterday?
2. Were they at the cinema?
3. Who was your favourite actor?
4. Was she a maths teacher?
5. When were they born?
6. Was he famous in the 1940s?