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Set up a building[x+5] Abbreviation.
Filial piety and hunger profit = 1000 [400-x 20] [x+5] 1000 [300x-20 x square return +2000] quietly.
Remove the invariant items.
300x-20 x squared.
At the same time, 20 gets 15x-x squared.
5+7=12 [layers].
or 5+8=13 [layers].
I want to rate.
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Hehe, there are an infinite number of solutions to this problem, and to be precise, CE DF can determine a line segment, so be it, how can the mass part of this problem be left ...... it
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There is also a condition that is not said: CD and EF are each symmetrical with respect to AB, and CD EF is divided into 3 equal parts AB.
Then the straight line formed by the sum is parallel to ab and the distance from ab is.
First ab:y=3x-10
Find ce: y=3x-10 + 10
df:y=3x-10-√10
Find cd: y=-1 3x+410 9
ef:y=-1/3x +320/9
Calculate their intersection.
It is also possible to use geometric methods to find in triangles
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1.Set a has x yuan. B has Y yuan. x+y=1800;x-40%x=y-200 can be calculated from the equation A and B's original deposit.
2.It turned out to be x kilograms. x-40%x-(40%-12)=28 to find x is the original number of kilograms.
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20+20+20=60
20 + 5 + 5 = 30 Note that the blue petals are 5 at this time, so one petal is 15-2 = 3
1 + 20 4 (4 petals at this point) = 81
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Safflower is twenty.
Five-petal jacaranda is five, and four-petal blueflower is four. The yellow flower is one.
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81, the number of petals of orchids is changing, and a few flowers represent a few.
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Solution: From the sinusoidal theorem we get bc sina = 2r, we get sina - root 3 2 bc is the longest side, and the triangle is a non-equilateral triangle.
a=2pai/3
sinb+sinc=sinb+sin(pai 3-b)=sin(b+pai 3), again 0 root3 2< sin(b+pai 3)<=1, the value range of sinb+sinc is (root3 2,1]< p>
Wood makes fire, earth gives birth to gold, and wood gives birth to earth. >>>More
According to Gregorian calendar time, your birth time is 10:45 p.m. on December 3, 2003. According to this time of birth, your eight characters are: Yang Shui Mu Shui |Zihai Chouhai attention: >>>More
Your eight characters are Jiazi Jisi Xin You Xin Mao.
It's a worm. Let's kill the poison.