Voted Questions
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Help you solve math 28/08/2017 at 15:061st way :10 + 20 + 60 + 40 + 80 + 90
=(1 + 2 + 6 + 4 + 8 + 9) x 10
=30 x 10
=300
2nd way :10 + 20 + 60 + 40 + 80 + 90
=(10 + 90) + (20 + 80) + (60 + 40)
=100 + 100 + 100
=100 x 3
=300
longia selected this answer. -
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longia 28/08/2017 at 15:08thank you
I don't know this question:There are 5 salmons,2 sharks,2 dolphins and 67 mackerels.How many fish are there?
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triệu lệ dĩnh 19/07/2017 at 10:15the number of wheels is :
4 x 2 + 2 x 3 + 1 x 4 = 18 ( wheels)
answer: 18...
Selected by MathYouLike
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→இے๖ۣۜBoy™†hïếuGîa 23/03/2017 at 14:34Nick will need : 134134 + 334334 = 112112 = 5,5
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Nguyên Hạo 16/03/2017 at 12:07Nick will need: \(1\dfrac{3}{4}+3\dfrac{3}{4}=\dfrac{11}{2}=5.5\) (cups of flour)
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Trần Đức Huy 15/05/2018 at 07:55Nick will need : 134134 + 334334 = 112112 = 5,5
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FA KAKALOTS 28/01/2018 at 22:17After Sunday night, fraction of book left is:
1−34=14
(book)
So fraction of book she read on Monday afternoon is:
14−15=120
(book)
On Monday afternoon, she read:
120−(120.14)=380
(book)
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Nguyên Hạo 16/03/2017 at 12:05
After Sunday night, fraction of book left is:
\(1-\dfrac{3}{4}=\dfrac{1}{4}\) (book)
So fraction of book she read on Monday afternoon is:
\(\dfrac{1}{4}-\dfrac{1}{5}=\dfrac{1}{20}\) (book)
On Monday afternoon, she read:
\(\dfrac{1}{20}-\left(\dfrac{1}{20}.\dfrac{1}{4}\right)=\dfrac{3}{80}\) (book)
FA Thần Tốc Độ
08/02/2018 at 21:46
FA Thần Tốc Độ
08/02/2018 at 21:49-
FA KAKALOTS 08/02/2018 at 21:55
\(A=\dfrac{1}{3^2}+\dfrac{1}{5^2}+\dfrac{1}{7^2}+...+\dfrac{1}{n^2}\)
\(A< \dfrac{1}{3^2-1}+\dfrac{1}{5^2-1}+\dfrac{1}{7^2-1}+...+\dfrac{1}{n^2-1}\)
\(A=\dfrac{1}{2.4}+\dfrac{1}{4.6}+\dfrac{1}{6.8}+...+\dfrac{1}{\left(n-1\right)\left(n+1\right)}\)
\(A=\dfrac{1}{2}\left(\dfrac{1}{2}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{8}+...+\dfrac{1}{n-1}-\dfrac{1}{n+1}\right)\)
\(A=\dfrac{1}{2}\left(\dfrac{1}{2}-\dfrac{1}{n-1}\right)< \dfrac{1}{4}\)
So \(A>\dfrac{1}{4}\)
FA KAKALOTS
09/02/2018 at 21:40-
mathlove 16/03/2017 at 18:29The circle of radius 3 have an area \(9\pi\). We sign r as the radius of the pictured quadrant of the done cỉcle, then
\(r=3\sqrt{2}+3\). Put x is the area to calculate, we have
\(\dfrac{1}{4}\pi r^2=2x+\pi.3^2+\left(3^2-\dfrac{1}{4}.\pi.3^2\right)=2x+9\left(1+\dfrac{3\pi}{4}\right)\)
\(\Leftrightarrow\dfrac{\pi}{4}\left(3\sqrt{2}+3\right)^2=2x+9\left(1+\dfrac{3\pi}{4}\right)\Leftrightarrow2x=\dfrac{\left(27+18\sqrt{2}\right)\pi}{4}-\dfrac{36+27\pi}{4}\)
\(\Leftrightarrow x=\dfrac{9\sqrt{2}\pi-36}{4}\)
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mathlove 17/03/2017 at 10:45
We have \(y=3^2-\left(\dfrac{1}{4}\pi3^2\right)\) and \(r-3=3\sqrt{2}\Rightarrow r=3+3\sqrt{2}\).
Selected by MathYouLike -
FA KAKALOTS 28/01/2018 at 22:09
The circle of radius 3 have an area 9π
. We sign r as the radius of the pictured quadrant of the done cỉcle, then
r=3√2+3
. Put x is the area to calculate, we have
14πr2=2x+π.32+(32−14.π.32)=2x+9(1+3π4)
⇔π4(3√2+3)2=2x+9(1+3π4)⇔2x=(27+18√2)π4−36+27π4
⇔x=9√2π−364
FA KAKALOTS
09/02/2018 at 22:11-
Help you solve math 10/02/2018 at 09:16
Mọi người vào google gõ xem nhận giải thưởng là 500k.
Gõ là :
Lazi cộng đồng học tri thức: Bài hát Chúng ta không thuộc về nhau do ca sĩ nào thể hiện?
