Các bạn giúp mình với ạ. Mình đg cần gấp ý
Các bạn giúp mình với ạ, mình đg cần gấp ạ.. Cảm ơn các bạn nhiều
Số tiền Nam mua sách: \(320000\times\dfrac{1}{4}=80000\) (đồng)
Số tiền Nam mua vở: \(90000:\dfrac{2}{3}=135000\) (đồng)
Số tiền Nam mua dụng cụ học tập: \(320000-\left(80000+135000\right)=105000\) (đồng)
Các bạn giúp mình với. Mình đg cần rất gấp ạ
Các bạn giúp mình nhanh với ạ , mình đg cần gấp
`B=(2015+2016+2017)/(2016+2017+2018)`
`=2015/(2016+2017+2018)+2016/(2016+2017+2018)+2017/(2016+2017+2018)`
Vì `2015/(2016+2017+2018)<2015/2016`
`2016/(2016+2017+2018)<2016/2017`
`2017/(2016+2017+2018)<2017/2018`
`=>B<A`
Bài 5
B= \(\dfrac{2015}{2016+2017+2018}\)+\(\dfrac{2016}{2016+2017+2018}\)+\(\dfrac{2017}{2016+2017+2018}\)
Ta có:\(\dfrac{2015}{2016}\)>\(\dfrac{2015}{2016+2017+2018}\),\(\dfrac{2016}{2017}\)>\(\dfrac{2016}{2016+2017+2018}\),\(\dfrac{2017}{2018}\)>\(\dfrac{2017}{2016+2017+2018}\)
⇒A>B
Giải:
Ta có:
\(B=\dfrac{2015+2016+2017}{2016+2017+2018}\)
\(B=\dfrac{2015}{2016+2017+2018}+\dfrac{2016}{2016+2017+2018}+\dfrac{2017}{2016+2017+2018}\)
Vì \(\dfrac{2015}{2016}>\dfrac{2015}{2016+2017+2018}\)
\(\dfrac{2016}{2017}>\dfrac{2016}{2016+2017+2018}\)
\(\dfrac{2017}{2018}>\dfrac{2017}{2016+2017+2018}\)
\(\Rightarrow A>B\)
Chúc bạn học tốt!
Bạn nào giúp mình với ạ , mình đg cần gấp .
a,\(\dfrac{2}{3}\)-\(\dfrac{5}{7}\).\(\dfrac{14}{25}\)
=\(\dfrac{2}{3}\)-\(\dfrac{2}{5}\)
=\(\dfrac{4}{15}\)
b,\(\dfrac{-2}{5}\).\(\dfrac{5}{8}\)+\(\dfrac{5}{8}\).\(\dfrac{3}{5}\)
=\(\dfrac{5}{8}\).(\(\dfrac{-2}{5}\)+\(\dfrac{3}{5}\))
=\(\dfrac{5}{8}\).\(\dfrac{1}{5}\)
=\(\dfrac{1}{8}\)
Giải:
a) \(\dfrac{2}{3}-\dfrac{5}{7}.\dfrac{14}{25}=\dfrac{2}{3}-\dfrac{2}{5}=\dfrac{4}{15}\)
b) \(\dfrac{-2}{5}.\dfrac{5}{8}+\dfrac{5}{8}.\dfrac{3}{5}\)
\(=\dfrac{5}{8}.\left(\dfrac{-2}{5}+\dfrac{3}{5}\right)\)
\(=\dfrac{5}{8}.\dfrac{1}{5}\)
\(=\dfrac{1}{8}\)
c) \(\left(\dfrac{1}{2}\right)^2-1\dfrac{1}{2}+0,5.\dfrac{12}{5}+5\%\)
\(=\dfrac{1}{4}-\dfrac{3}{2}+\dfrac{1}{2}.\dfrac{12}{5}+\dfrac{1}{20}\)
\(=\dfrac{-5}{4}+\dfrac{6}{5}+\dfrac{1}{20}\)
\(=0\)
Chúc bạn học tốt!
c,\(\left(\dfrac{1}{2}\right)^2\)-1\(\dfrac{1}{2}\)+0,5.\(\dfrac{12}{5}\)+5%
=\(\dfrac{1}{4}\)-\(\dfrac{3}{2}\)+\(\dfrac{1}{2}\).\(\dfrac{12}{5}\)+\(\dfrac{1}{20}\)
=\(\dfrac{1}{4}\)-\(\dfrac{3}{2}\)+\(\dfrac{6}{5}\)+\(\dfrac{1}{20}\)
=\(\dfrac{-5}{4}\)+\(\dfrac{6}{5}\)+\(\dfrac{1}{20}\)
=\(\dfrac{-1}{20}\)+\(\dfrac{1}{20}\)
=0
=
Các bạn giúp mình với nhé.. Mình đg cần gấp ấy. Mình cảm ơn các bạn trước
1.the souvenirs inside the temple of literature are sold at a higher price
2. can you help me to make a glass of lemonade, please?
3.Linh finds playing chess interesting because he can play it with his close friend.
4.i think people in the countryside eat a lot of fresh vegetable so they live longer
5.volunteer work is very hard for my sister but she she really enjoys doing it
Các bạn giúp mình với nha. Mình đg cần gấp. Cảm ơn các bạn trước
1 doesn't like
2 was reconstructed
3 have ever tried
4 will you take
5 is made
6 often rains - isn't raining
7 had
8 are standing
9 are
1. doesn't like
2. was reconstructed
3. I have ever tried
4. will you take
5. is made
6. often rains - isn't raining
7. had
8. are standing
9. are
cách bạn giúp mình nhanh ạ . mình đg cần gấp
a) Ta có: 3x-17=x+3
\(\Leftrightarrow3x-x=3+17\)
\(\Leftrightarrow2x=20\)
hay x=10
b) Ta có: \( \left|x-3\right|-12=\left|-5\right|\)
\(\Leftrightarrow\left|x-3\right|=17\)
\(\Leftrightarrow\left[{}\begin{matrix}x-3=17\\x-3=-17\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=20\\x=-14\end{matrix}\right.\)
Vậy: \(x\in\left\{20;-14\right\}\)
c) Ta có: \(25-\left(x-5\right)=-415-\left(15-415\right)\)
\(\Leftrightarrow25-x+5=-415-15+415\)
\(\Leftrightarrow30-x=-15\)
hay x=45
Vậy: x=45
3x - 17 = x + 3
3x = x+3 +17
3x = x+20
3x-x=20
2x = 20
x= 20:2
x = 10
b ) |x-3| -12 = |-5|
|x-3| = 12 + 5
|x-3|=17
\(\left[{}\begin{matrix}x-3=17\\x-3=-17\end{matrix}\right.\) =>\(\left[{}\begin{matrix}x=17-3\\x=-17-3\end{matrix}\right.\)=>\(\left[{}\begin{matrix}x=14\\x=-20\end{matrix}\right.\)
vậy x= 14 hoặc x= -20
c) 25 -(x-5) = -415 -(15-145)
25-(x-5) = 15
x-5 = 25 -15
x-5 = 10
x = 10 - 5
x = 5
Các bạn giúp mình với nha. Mình đg cần gấp á
1. How will they travel to HN?
2. Where is the high school?
3. Who would you like to take the trip with?
4. Does she like visiting famous historical places?
5. How long has your brother learnt to play the guitar?
6. Why do you often listen to English songs?
7. How far is it from Hue to HCM City?
1. How will they travel to Ha Noi?
2. Where is the high school?
3. Who would you like to take the trip with?
4. Does she like visiting famous historical places?
5. How long has your brother learnt to play the guitar?
6. Why do you often listen to English songs?
7. How far is it from Hue to HCM City?
1. How will they travel to HN?
2. Where is the high school?
3. Who would you like to take the trip with?
4. Does she like visiting famous historical places?
5. How long has your brother learnt to play the guitar?
6. Why do you often listen to English songs?
7. How far is it from Hue to HCM City?
Giúp mình với ạ mình đg cần gấp :)
câu 12 :A
câu 13 :B
câu 14 :D
câu 15 :A
câu 16 :D
câu 17 :A
câu 18 :C
câu cuối mik chx chắc lắm