Anh em giúp tui với
a,b=30.(a,b)=[a,b].6
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H
17 tháng 12 2021
5. We write essays and learn about books in ________.
A. Literature B. Math C. Science D. Music
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A. buffalo shed B. chicken shed C. chicken coop D. Both A and B
8. ____________ go fishing with me next weekend?
A. Let’s B. Why don’t we C. Would you like D. A & B
9. Students have two __________ each day.
A. 20-minutes break B. 20-minute breaks C. 20-minute break D. 20-minutes breaks
10. It’s time _______ recess. Children often play hide-and-seek __________ recess.
A. for/at B. to /at C. on/at D. at/at
11. Fast food is____________.
A. health B. unhealthy C. healthy D. healthier
12. Science books are on the shelves _______ the back of the room.
A. at B. in C. on D. for
13. Nga’s theater group is _____ a play for the school anniversary celebration.
A. rehearsing B. practicing C. learning D. doing
14. I think she __________ the party tomorrow.
A. will enjoy B. enjoy C. enjoys D. is enjoying
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A. time B. relax C.recess D. free time
16. Washington D.C is the_____________of the United State of America.
A. town B. city C. street D. capital
17. Students have to do lots of __________in physics.
A. experiments B. housework C. experience D. housewife
18. American teenagers ________ eating in fast food restaurants.
A. want B. would like C. enjoy D. can
19. I am very good at ________things.
A. fix B. fixes C. to fix D. fixing
20. Hoa’s father works ________hours than Tim’s father.
A. much B. many C. more D. less (cả hai đều đúng)
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TL
7
MC
15 tháng 7 2021
a) \(\frac{3}{4}x-\frac{1}{4}=2\left(x-3\right)+\frac{1}{4}x\)
\(\frac{3}{4}x-\frac{1}{4}=2x-6+\frac{1}{4}x\)
\(\frac{3}{4}x-2x-\frac{1}{4}x=\frac{1}{4}-6\)
\(x\left(\frac{3}{4}-2-\frac{1}{4}\right)=-\frac{23}{4}\)
\(-\frac{3}{2}x=-\frac{23}{4}\)
\(x=-\frac{23}{4}\div\left(-\frac{3}{2}\right)\)
\(x=\frac{23}{6}\)
NN
Nguyễn Ngọc Anh Minh
CTVHS
VIP
31 tháng 1 2019
\(a-b\) là bội của 6 nên \(a-b\) chia hết cho 6
\(a-b\) chia hết cho 6 \(\Rightarrow\left(a-b\right)+12b=a+11b\) chia hết cho 6 => \(a+11b\) là bội của 6
\(\left(a+11b\right)+\left(5a+b\right)=6a+12b\) chia hết cho 6 mà \(a+11b\) chia hết cho 6 nên \(5a+b\) chia hết cho 6 => \(5a+b\) là bội của 6