1. Among the four teams of the sixth grade love team, there are 23 people in the first and second teams. The number of the second, third and fourth teams is 8 / 23 more than the total number of the first and second teams. It is known that the second team accounts for 1 / 5 of the total number of the team. How many people are there in the sixth grade love team? 2. It takes 15 days for team a to build a section of road, while team B can build 44 meters a day. When the two teams finish the road together, team a has built 60% of the total length of the road. How many meters is the total length of the road?

1. Among the four teams of the sixth grade love team, there are 23 people in the first and second teams. The number of the second, third and fourth teams is 8 / 23 more than the total number of the first and second teams. It is known that the second team accounts for 1 / 5 of the total number of the team. How many people are there in the sixth grade love team? 2. It takes 15 days for team a to build a section of road, while team B can build 44 meters a day. When the two teams finish the road together, team a has built 60% of the total length of the road. How many meters is the total length of the road?

1.a+b=23
2.b+c+d=(a+b)*（1+8/23）
3.b=(a+b+c+d)*1/5
A + B + C + D = 5B
It is concluded from 2 and 4 that 5. A + (a + b) * 31 / 23 = 5B
Add B to both sides at the same time to get: 6. A + B + (a + b) * 31 / 23 = 6B
23+23*31/23=6b
b=9
Total 45

In a hurry
1. A clothing store made a profit of 480000 yuan in the first half of last year, which is one fifth less than that in the second half of last year. How much was the profit in the second half of last year
2. Uncle Wang's new house decoration, in the final accounts of decoration costs, less than the budget expenses of 28000 yuan, the actual decoration expenses of 222000 yuan, how many percent less than the budget?

1. In the second half of last year, the profit of clothing sales was x 10000 yuan, then (1-1 / 5) x = 48 x = 600000 yuan
2.2.8 / (2.8 + 22.2) = 0.112 = 11.2%, 11.2% less than the budget

Urgent problems in Mathematics
1. The actual distance between Party A and Party B is 500 kilometers. On the map with a scale of 1:4000000, how many centimeters is the distance between Party A and Party B?
2. If there are 9 people in each line, how many lines can you stand
3. Xiaohong's height is 1.2m, and her shadow length is 2.4m. If the shadow length of a tree is 3.5m measured at the same time and place, how tall is the tree
4. To make a cylindrical tin oil barrel without cover, its bottom radius is 4 decimeters, and its height is 5 decimeters. At least how many square decimeters of tin is needed? If the weight of each liter of gasoline is 0.75 kg, how many kg of gasoline can this barrel hold?
5. It takes 40 / 3 hours for a satellite to orbit the earth five times. How many hours does it take for a satellite to orbit the earth nine times at the same speed
There should be a formula, not just the result
I'll get extra points

(1) X: 500000 = 1:4000000, x = 0.125m (2) 15 × 12:9 × x = 180:9 × 20, x = 20 rows (3) x: 3.5 = 1.2:2.4, x = 1.75m (4) the size of iron sheet for oil barrel is 2x3.14x4x5 + 3.14x4 ^ 2 = 175.84m2, and the volume of oil barrel is 3.14x4 ^ 2x5 = 251.2m3, then it can hold 251 gasoline

In the third monthly exam, I took the exam for a while, now I review and have another question, but this time there are 199, so I can't count them one by one
Question:
According to the following rule, the 199th pattern has________ Little star
☆ ☆ ☆ ☆ ☆ ☆
☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ .
☆ ☆ ☆ ☆ ☆ ☆
Figure 1 Figure 2 Figure 3 Figure 4
The only rule I find now is 3 + 1 + 2 + 1 + 2 + 1 + 2
You'd better tell me how many stars there are in the 199th little star~

Rule: odd pattern: 3 * (x + 1) / 2
Even number of patterns: 3 * x / 2 + 1
So the 199th pattern has 3 * (199 + 1) / 2 = 300
If you have any new questions, please don't send them in the form of follow-up questions, send them to me for help or send them to the question link address,
Your adoption is the driving force of my service

==I'm typing
(1) There are several dormitories in a school. If there are four dormitories, then there are 18 dormitories left. If there are six dormitories, then there are six dormitories, then there is one dorm that is not full. The number of dormitories and the number of dormitories are calculated. (use the system of linear equations of two variables in Volume 2 of junior high school to solve)
(2) The first time, pour the water in cup a into cup B to double the water in cup B; the second time, pour the water in cup B into cup a to double the water left in cup a, and at this time, there is 64% water in each of the two cups. How many grams of water does a and B have? (using the solution of the system of linear equations of two variables in the second volume of the first grade of junior high school)
(3) The total amount of payment should not exceed 11815 yuan. The wholesale price and retail price of the two ball manufacturers are shown in the table below.
Wholesale price of name manufacturer (yuan / piece) retail price of Mall (yuan / piece)
Basketball 130 160
Volleyball 100 120
How many basketball can the buyer buy at most? (using the inequality solution of volume two of grade one of junior high school)
If the store sells all the 100 balls at the retail price, how many basketballs should the buyer buy at least in order to make a profit of no less than 2580 yuan? What is the maximum profit of the mall

(1) There are x dormitories, y people, and W people who are not full
{4X+18=Y
{6（X-1）+W=Y
The answer is: 11 rooms, 62 people or 10 rooms, 58 people
(2) Suppose that a had x grams of water, B had 128-x grams of water, and that a poured y grams of water for the first time
{X-Y=128-(128-X)*2
{2(X-Y)=64
The solution is: x = 80, y = 48
So: a original 80 grams of water, B has 48 grams of water
(3) One: set up basketball to buy x
130x or = 2580
The solution is x > or = 58
So buy at least 58 basketballs
Shopping malls make the most money when they buy 90 basketballs
30 * 90 + 20 * 10 = 2900 yuan
So the shopping mall can earn 2900 yuan at most

Who will help me solve these three math problems?
Simple calculation: 10.5 △ 3.5 △ 34.2 × 9.1 + 42 × 0.09 16 × 0.25

10.5÷3.5÷3
=10.5÷(3.5×3)
=10.5÷10.5
=1
4.2×9.1+42×0.09
=4.2×9.1+4.2×0.9
=4.2×(9.1+0.9)
=4.2×10
=42
16×0.25
=4×4×0.25
=4×(4×0.25)
=4×1
four

1. Number a is 60% more than number B, and number B is ()% less than number a
2. Drink 30% of a glass of milk and fill it with water. Mix well and drink 50% of it. At this time, the milk in the glass accounts for ()% of the capacity of the glass
3. The contract stipulates that the freight of each case is 10 yuan. If one case is damaged, the freight will not be paid and the loss will be 50 yuan. At the time of settlement, the total freight will be 3200 yuan. How many water bottles are damaged?
The third question needs calculation,

37.5
thirty-five
（350*10-3200）/（10+50）
=300 / 60 = 5 cases

(a²+2ab+b²)-3(a²-2ab+b²)
machine

(a²+2ab+b²)-3(a²-2ab+b²)
=a²+2ab+b²-3a²+6ab-3b²
=-2a²+8ab-2b²

Let a, B, C triangle be three sides, and try to explain: A & # 178; - B & # 178; - C & # 178; - 2Ab < 0

∵ a, B and C are the three sides of the triangle, and the sum of any two sides of the triangle is greater than the third side
A > 0, b > 0, C > 0, and B + C > a
∴(b+c)^2>a^2
∴b^2+c^2+2bc>a^2
That is a ^ 2-B ^ 2-C ^ 2-2bc

Xiao Ming said: A ^ 2-6a + 9 / A-3 can be reduced to A-3, so a ^ 2-6a + 9 / A-3 is not a fraction
Is he right and give your reasons

Incorrect
1、 The title does not state "A-3 > 0"
2、 The original form of the title accords with the concept of fraction, and it is still fraction without simplification