English translation Yao Ming has more than just size:he also has great skill and speed and he is a team player.Yao Ming is the son of two great basketball players and learnt how to play one of the world's most popular games when he was young.Now ,as one of the stars in the NBA, Yao Ming is working hard to live his dream and show the world that Chinese basketball players love this game too!

English translation Yao Ming has more than just size:he also has great skill and speed and he is a team player.Yao Ming is the son of two great basketball players and learnt how to play one of the world's most popular games when he was young.Now ,as one of the stars in the NBA, Yao Ming is working hard to live his dream and show the world that Chinese basketball players love this game too!

The one upstairs doesn't seem to be very accurate
Yao Ming is bigger than normal, he has good skills and speed, he is a player. Yao Ming is the son of two great basketball players, and he learned how to play the world's most popular super game when he was young. Now, as an NBA star, Yao Ming has been working hard for his dream, and he wants to let the world know that Chinese basketball players love this sport as well

Doing mathematical problems by solving equations
Apple trees account for 9 / 50 of the total number of fruit trees in the orchard, and apricot trees account for 3 / 50 of the total number of fruit trees. There are 240 fewer apricot trees than apple trees. How many apple trees and apricot trees are there in this orchard
How much is the original price of a piece of clothing? How much is the original price of this piece of clothing
How many kilometers per hour should we walk for the rest of the journey?

Suppose all the fruit trees have X trees, then the apple tree has 9x / 50, the apricot tree has 3x / 50, so the equation is listed
9x/50-3x/50=240
6x/50=240
x=240*50/6=2000
So there are 2000 * 3 / 50 = 120 apricots
Suppose the original price is x yuan
After the price increase, it will be x (1 + 1 / 5), and then the price decrease will be x (1 + 1 / 5) (1-3 / 10)
x(1+1/5)(1-3/10)=420
x*6/5*7/10=420
x=500
It is assumed that the average distance should be x kilometers per hour
4 / 5 hours, 9 / 2 * 4 / 5
The whole process is 9 / 2 * 4 / 5 (3 / 8) = 144 / 15
The rest of the way is 9 / 2 * 4 / 5 (3 / 8) * (1-3 / 8)
So the equation is
2x=9/2*4/5÷(3/8)*(1-3/8)
2x=18/5÷(3/8)*5/8
2x=144/15*5/8
2x=18/3
x=3

What is the formula for calculating the area of a rectangle?

Length times width

1. This paper discusses the continuity of function: (1) the square of y = X-1 / x-3x + 2; (2) y = {1 / x power of E, x < 0; 1, x = 0; X, x > 0
If there are discontinuities, indicate the type
(2) When x ＜ 0, y = 1 / x power of E; when x = 0, y = 1; when x ＞ 0, y = X

(1) X = 0 discontinuity, the infinite discontinuity in the second kind;
(2) X = 0 discontinuity, infinite discontinuity in the second kind

(1) Does the algebraic expression 10 - x + 3 - (2x + y) (2x + y) have a maximum or a minimum? What is the value
(2) When the maximum or minimum value of the algebraic formula 10 - x + 3 - (2x + y) (2x + y) is obtained, find the value of the algebraic formula 3 / 4 times the square of X - (3y-1 / 4 times the square of x) + y

|x+3|>=0,(2x+y)²>=0
So - | x + 3|

As shown in the figure, fold the rectangular piece of paper ABCD, B and C coincide at the point P on the edge, known angle MPN = 90 degrees, PM = 3, PN = 4!
My drawing is not standard! Think in your own head! I'm sorry!

What are the two points of your Mn

The known a square + AB = - 3, the square of AB + B = 7, try to find the sum of the squares of a + 2Ab + B to get the value of the square of square - B
Very urgent, thank you. 555555

Simple!
From the square of a + 2Ab + B = (the square of a + AB) + (AB + b) = - 3 + 7 = 4;
(a*a+ab)-(ab+b)=a*a-b=-3-7=-10;
So the square is 100

Y = 2 (x ^ 3) + 23x, when x = - 4, how much is dy / DX = (^ for exponent, dy / DX for derivative)

The derivation of function y gives dy / DX = 6x & # 178; + 23
When x = - 4, dy / DX = 6x & # 178; + 23 = 6 × (- 4) &# 178; + 23 = 119

Please help me with seven math problems
1. A factory forged a cylindrical bottle with a diameter of 60 mm and a height of 20 mm to contain water, and then poured the water into a cylindrical glass with a bottom diameter of 6 cm and a height of 10 cm. Can it be completely filled? If not, how high is the water surface in the bottle? If not, the distance between the water surface in the glass and the mouth of the glass should be calculated
2. Use a cylindrical oil reservoir with a bottom radius of 5cm, and the oil is soaked with steel balls. If 546 π g steel balls are pulled out of the reservoir, how many centimeters has the liquid level dropped? (1 cubic centimeter steel ball 7.8G)
3. For a batch of goods, Party A reduces the original price by 10 yuan, and uses 10% of the price as the fund. Party B reduces the original price by 20 yuan, and uses 20% of the price as the fund. If two people have the same amount of money, the original price shall be sought
4. The distance between the two docks is 72km. It takes 6 hours for a ship to sail downstream and 9 hours for a ship to sail upstream
5. For a rectangular field whose length is 8 meters more than width, open a road with a width of 4 meters around, so that the area of the road accounts for 2 / 5 of the original field area. How many meters are the length and width of the original rectangular field?
6. A and B pipes inject water into the pool. When a pipe is opened separately, a pool of water can be filled. When B pipe is opened separately, a pool of water can be filled?
7. It is every citizen's duty to pay taxes according to law. Citizens with income should pay taxes according to the prescribed tax rate. In 2006, the monthly taxable income is the balance after deducting 1600 yuan from the income. Mr. Li paid 33 yuan of personal income tax in November 2007, so how much is Mr. Li's income in December?
Level monthly taxable income tax rate
1. The part not exceeding 500 yuan 5%
2 500 to 2000 yuan 10%
3. 15% of 2000-5000 yuan portion
4. 20% of the part exceeding 5000 yuan

1. The height of the cylinder is 2cm, the height of the glass is 10cm, so the water in the bottle must not be filled after pouring into the cup. Obviously, the distance between the water surface in the cup and the mouth of the cup is 10-8 = 2cm. 2

How to change the quadratic function y = 1 / 4x ^ 2 + X-1 into y = a (x + m) ^ 2 + k?

y=1/4X^2+X-1
=1/4(x^2+4x+4-4)-1
=1/4(x+2)^2-2