Ai giúp mk với
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360. Scientists ( để -s vì có have ) have researched science subjects.
361. His father is an architect.
362. Japan is an idustrial.
363. The solution of the book..
364. Every success...
365. Can you imagine .... ( Câu này chưa chắc )
366. The United Nations organization...
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Giải:
3/2016+3/2017-3/2018 / 5/2018-5/2017-5/2016
=3.(1/2016+1/2017-1/2018)/5.(1/2018-1/2017-1/2016)
=-3/5
Chúc bạn học tốt!
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Bài 1:
a: x=4
nên x+1=5
\(A=x^5-x^4\left(x+1\right)+x^3\left(x+1\right)-x^2\left(x+1\right)+x\left(x+1\right)-1\)
\(=x^5-x^5-x^4+x^4+x^3-x^3-x^2+x^2+x-1\)
=x-1
=4-1
=3
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First, I am going to visit Ha Long Bay for two days
Then, I am going to see Ngoc Son Temple in Ha Noi for a week
Next, I am going to visit Hue for a week.
After that, I am going to see the citadel
Next, I am going to stay at a friend's house in Nha Trang for three days
Then, I am going to stay with their uncle in Ho Chi Minh City for a week
After that, I am going to visit the beach and swim in Nha Trang
Next, I am going to visit my friend
Then, I am going to see a movie
After that, I am going to wath a soccer match
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2x−92402x−9240=39803980⇒⇒2x−92x−9=240.3980240.3980=117117
2x−9=1172x−9=117⇒⇒2x=117+9=1262x=117+9=126⇒⇒x=126:2=63
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Ta có: -3x-10=-2x-5
\(\Leftrightarrow-3x-10+2x+5=0\)
\(\Leftrightarrow-x-5=0\)
\(\Leftrightarrow-x=5\)
hay x=-5
Vậy: x=-5
a, \(A=3y+\sqrt{16-24y+9y^2}=3y+\sqrt{\left(4-3y\right)^2}\)
\(=3y+\left|4-3y\right|\)Thay y = -3 vào biểu thức trên ta được :
\(=-9+13=4\)
b, \(B=5y-\sqrt{4y^2+12y+9}=5y-\sqrt{\left(2y+3\right)^2}\)
\(=5y-\left|2y+3\right|\)Thay y = -\(\sqrt{5}\)vào biểu thức trên ta được :
\(=-5\sqrt{5}-\left[2.\left(-\sqrt{5}\right)+3\right]=-5\sqrt{5}+2\sqrt{5}-3=-3\sqrt{5}-3\)