Urgent!!! There are a few topics that I need the process for, who can help me?

One. The speed of the order is v1, the speed of the light is v2, the time taken in the previous stage is t1, and the time spent in the latter stage is t2.

From the previous stage.

s*(5/8)/t1=v1;..1

135/t1=v2;..2

Obtained from the latter stage.

s/t2=v1;..3

s/t2=v2...4

2 formula 1 formula = v1 v2 = 4 formula 3 type.

Gives s*(5 8)] 135=s [s*(8 9)] gives s=243

I'll give you a question first.

The second equation is like this, solve it yourself, don't rely on others.

v1+v2)*12=s

v2*t1=s*(3/10)

v1*t2=s-(v1+v2)*t1

t1+t2=14

v1*t2=s-(v1+v2)*s*(3/10)/v2

135 divided by 5 8 equals how much to do in 8 9 is the total amount to be done, subtract 10 molecules from 1 3 equals the remainder and divide by 14 equals what A does every day, and then divide by 1 by this number is how many days A has to do.

If x is done in the unit time, and y is done in the Ming period, then they all use the same time to record Z1 when they complete 5 8 in the inscription, and when they complete 8 9 in the Ming Dynasty, the time is Z2, and the total number of records is A, then there is the following relationship.

y×z1=135...Type 1.

x×z2=5/8a...Type 2.

y×z2=a...Type 3.

x×z2=8/9a...Type 4.

Type 1, Type 2, Type 3, Type 4.

9 8 = 27 8a

Calculate a=192

The first floor is, you can count a fart like that.

The second upstairs equation is also correct.

But the result is different, is there a miscalculation upstairs?

Solution process: because the square of a - the square of b = 2010 and because the square of a - the square of b = (a+b)(a-b) and a+b=1 so a-b = 2010

p=(2a+n-1)*n/2

of the 6th power. 4。On the summer solstice, the sun shines directly on the Tropic of Capricorn.

On the day of the vernal and autumnal equinoxes, the sun shines directly on the equator.

On the winter solstice, the sun shines directly on the Tropic of Capricorn.

p=(2a+n-1)*n/2

4.Tropic of Cancer.

Equatorial Tropic of Capricorn.

* (1-18%) = 41 tons.

2. Set the storybook as x

x-60=80%x

x = 300 copies.

3. [100*(1+10%)] (1-0%)=99 yuan -100*(1-25%)=45 yuan5, yuan.

20% + 18 = 108 km.

7. Original price: 480 (1-20%)+480 (+20%)=1000 yuanSelling price: 480*2=960 yuan.

The actual selling price is lower than the original price, so Aunt Wang is actually losing money.

Very convinced, if you are a student, you have learned in vain. Look at the book and do it yourself.

One. 50 (ii.) 300 III. 99 IV. 45 V. 11.(75 divided by 94%) multiplied by 6% 6 90 7 80-120 = -40 loss 8 20% 30 25 26 20 25 All to !!

The topic is **, why is it so messy.

1) 7＝2*3+1

Therefore a=42) pcs.

1**.1 [7 pcs] * pcs] ==

3) 1/a≠a/b=1/3

a=3 b=9

ab=27 ( To be honest, I don't quite understand what this question means) 4) 98 2 96

The greatest common divisor of the numbers 96, 120, and 168 is 24, which means that there are 24 students in the class.

(1) Six out:

Six out of Qishan, after Liu Bei's death, in order to complete the great cause of assisting Han Xingliu Liu, Zhuge Liang made six northern expeditions to the Central Plains, each time sending troops from Qishan).

2) Seven captures: Seven captures of Meng Shu, the Southern Barbarian King Meng Shu rebelled, Zhuge Liang led troops to suppress, in order to recover the hearts of the Southern Barbarians, seven times captured Meng Shu without killing, and finally made Meng Shu convinced and admired with takeaways, and swore never to rebel).

3) Collect Erchuan:

Collect Dongchuan and Xichuan, that is, Jingyi Erchuan, and lay a foundation for the Shuhan Foundation) (4) Eight formations:

Set up a gossip array).

5) North rejection: North rejection Cao Cao).

6) Donghe: Donghe Sun Quan).

Six out of Qishan.

Seven captures of Meng Hu. Liu Bei received Erchuan.

Zhuge Liang lined up eight formations (pictured).

The north rejected Cao Cao. Dong and Sun Quan.

Six out: (six out of Qishan) Seven captures: (seven captures of Meng Shu) Collect two rivers: (collect Dongchuan, Xichuan).

Donghe: (Donghe Sun Quan) North refusal: (North refusal Cao Cao) Eight formations: (Bagua array).

The upper and lower links condense the martial arts of Prime Minister Zhuge Cheng's life.

cif = cfr /

Dollar. Therefore, the CIF price should be reported in US dollars.

The landlord knows that there must be brave men under the heavy reward.

3.36 (106-1)=3780 m 3780 70+1=55 B 4Set rough machining x kilograms, slow opening then yard which beam finishing 3x 2000, late transport train equation:

x (3x 2000) 10000 to get x 2000

The width of the top is: root number (

Therefore, the agricultural film needed (slowly only counts as disturbing the eggplant residue on the top, and the side does not count) for.