6 / 8 numerator plus 9, denominator plus (# 160;) the size of the fraction will not change?

twelve
Note that 6 / 8 = 9 / 12
Using the theorem of ratio

Please answer the math application questions of grade 5 in detail, thank you! (1721:3:38)
A, B two bus stops a total of 135 cars, if from a station out of 36 cars to B station, and then from B station out of 45 cars to a station, then B station stops the vehicle is a station 1.5 times

A, B two bus stops a total of 135 cars, if 36 cars from a station to B station, and then 45 cars from B station to a station, then B station stops the car is 1.5 times as much as a station. The original a, B two stops how many cars. A, B two stops x, YX + y = 135 (x-36 + 45) * 1.5 = y-45 + 361.5x + 13

Application of quadratic equation of one variable in grade three of junior high school
When a travel agency organizes a tour group to visit Beijing in a certain place, the cost of each person's travel expenses and tickets is 3200 yuan. If the charge standard is set at 4600 yuan per person, only 20 people will participate in the tour group. When the charge is higher than 4600 yuan, no one will participate. Every 100 yuan reduction from 4600 yuan will increase the number of participants by 10.
(1) When the rate of charge per person is fixed, the travel agency can make a profit of 64000 yuan from the tour group?
(2) Is it possible to make a profit of more than 64000 yuan?
Mainly the second question.

If the charging standard is set as X Yuan, then [20 + 10 (4600-x) / 100] * (x-3200) = 64000 (20 + 460-0.1x) (x-3200) = 64000 (4800-x) (x-3200) = 640000x ^ 2 + 8000x + 16000000 = 0 (x-4000) ^ 2 = 0x4000, the pricing is 4000 yuan, and the profit is 64000 yuan

A swimming pool is 50 meters long and 25 meters wide. The water inlet pipe of the pool injects 300 cubic meters of water into the pool every hour and fills it up in 10 hours. How many meters deep is the pool?

50 * 25 = 1250 cubic meters
300 * 10 = 3000 cubic meters
3000/1250=2.4m
That's it. I don't want to say much. I'll give you points

Simple calculation: (6.5 * 0.68 * 2.28) / (1.3 * 1.7 * 0.19) =?

(1.3*5*1.7*0.4*0.19*12)/(1.3*1.7*0.19)=5*0.4*12=24

Idioms of head head head hair horn

1 (rare horn) 2 (tortoise and rabbit horn) 3 (CAPE) 4 (dancing horn)
1 (aura) 2 (Swertia) 3 (Solenopsis)
Angry eyes: wide open eyes, prominent eyes. Describe the face formidable
Idiom: rare
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[Pinyin]: F è ng m á o l í n Ji ǎ o
with the head of a buck and the eyes of a rat
The usage frequency of the head of Swertia
Pronunciation zh ā n ɡ t ó u sh ǔ m ù
The definition is as small and sharp as a bag and as small and round as a water deer, and the eyes are as small and round as a mouse
According to the biography of Li Kui in the old book of the Tang Dynasty, "the scholar of dragon, Zhang and Fengzi is useless. The son of zhangtoumuru is an official."
For example, we can see that many young students come in one after another, some are small, some are old, some are dignified, some are well-dressed, some are blue and ragged
They are ugly and ugly
The antonym is beautiful and beautiful
With the head of a buck and the eyes of a rat
It is a combination of usage, predicate and attribute, with derogatory meaning
【 zdic.net Handian.com]
Phoenix's feather, unicorn's horn. It refers to precious and rare people or things
[source]: in Song Dynasty, Liu Yiqing's Shi Shuo Xin Yu Rong Zhi: "Da nugu has his own Phoenix hair." "biography of Xie Chaozong in Southern History:" there is a unique Phoenix hair in Chaozong. "" preface to biography of Wenyuan in northern history ":" scholars are like ox hair, and winners are like rare. "
[example]: you are the only one who has passed the examination in the whole county, no matter what
One in a hundred
Antonym: a lot of things
Grammar: combined; used as object and attribute; with commendatory meaning

In a class, there are 4 students who get 100 points, 11 students who get 90 points, 11 students who get 80 points, 8 students who get 70 points, 5 students who get 60 points, and the remaining 8 students who get 300 points. Then the average is (accurate to 0.1), the mode is The median is__ ．

The average number is: 300 ÷ (4 + 11 + 11 + 8 + 5 + 8) = 300 ÷ 47 ≈ 6.4, there are 11 people with 90 scores and 11 people with 80 scores. If the number of times is the most, then the mode number is 80 and 90. If the 47 numbers are arranged from small to large, the middle number is the 24th number, and if it is 80, then the median number is 80; so the answer is: 6.4, 80 and 90, 80

1.5x+2=2x-16
1.5x+2=2x-6
Wrong number. It's 5x + 2 = 2x-6

5x+2=2x-6
5x-2x=-16-2
5x-2x=-6-2
3x=-8
x=-8/3
5x+2=2x-16
5x-2x=-16-2
3x=-18
x=-6

This is a very interesting book for me

Improper word order
Change to
This is a very interesting book

Suppose that the marginal cost function of a manufacturer is MC = 3Q ^ 2-30q + 100, and the total cost of producing 10 units of production is 1000
Find 1, fixed cost value 2, total cost, total variable cost function, average cost function, average variable cost function

Solution: MC = 3q2-30q + 100
So TC (q) = q3-15q2 + 100Q + M
When q = 10, TC = 1000 = 500
Fixed cost value: 500
TC(Q)=Q3-15Q2+100Q+500
TVC(Q)= Q3-15Q2+100Q
AC(Q)= Q2-15Q+100+500/Q
AVC(Q)= Q2-15Q+100

6 / 8 numerator plus 9, denominator plus (# 160;) the size of the fraction will not change?