Granny Wang raised 20 ducks and chickens, three times as many as ducks. How many ducks and chickens are there

Granny Wang raised 20 ducks and chickens, three times as many as ducks. How many ducks and chickens are there

If the duck raised by Granny Wang is x, the chicken is 3x
3X+X=20
4X=20
X=5
20-5=15
So Granny Wang raised 5 ducks and 15 chickens

Please write the procedure. The range of function f (x) = 3-4x, X ∈ [- 1,1] is ()

The function f (x) = 3-4x is obviously a decreasing function, so
f(-1)max=7
f(1)min=-1
So the function range [- 1,7]

The sales volume of both enterprises in 2010 was RMB 10000. In 2011, the sales volume of enterprise a increased by X% due to the poor management of enterprise B, and the sales volume decreased by X%
(1) In 2012, how many million yuan more will the sales of enterprise a than that of enterprise B?
(2) If M = 250, x = 5, how much more will the sales of enterprise a be than that of enterprise B in 2012

m×（1 x％）-m×（1-x％）=2mx％
2 × 250 × 5% = 250000 yuan

Write the sequence 9, 9999999 A general term formula of an=______ ．

Sequence 9, 9999999 That is the sequence 10-1102-1103-1104-1 Therefore, the answer is: 10n-1

The volume of a basketball is 9850 cubic centimeter, the radius of the ball is R. (the volume formula of the ball is v = 4 / 3 π r square, π is 3.14, the result is accurate to
0.1cm）

(4/3)×π×r³=9850;
R = 13.3 cm
I'm very glad to answer your questions. Skyhunter 002 will answer your questions
If you don't understand this question, you can ask,

Once upon a time, there was a farmer who had 17 sheep. Before he died, he told his three sons to share the sheep. He said that the eldest son shared half of all the sheep, the second son shared one third of all the sheep, and the youngest son shared one ninth of all the sheep, but he was not allowed to kill or sell the sheep,

First borrow a sheep, and then send it back, perfect
17+1=18
18/2=9
18/3=6
18/9=2
The eldest son got nine,
The second son got six
The youngest son got two

There is a certain rule in the arrangement of the numbers in the following column. What is the 1000th number? What is the 1000th number?
2,5,10,17,26…

1^2+1=2
2^2+1=5
3^2+1=10
4^2+1=17
5^2+1=26
.
1000^2+1=1000001
.
10000^2+1=100000001
.

The sum of all integers whose absolute value is greater than 3 but less than 7 is?

Absolute values are less than 7 &; &; - 6-5-4-3-2-10123456. Absolute values greater than three are - 6-5-4 and 456

Read the following materials,
We know that the equation 2x + 3Y = 12 has innumerable solutions, but in real life we only need positive integer solutions
For example, 2x + 3Y = 12
Y = (12-2x) / 3 = 4 - (2 / 3) x (x, y are positive integers)
Because y = (2 / 3) x is a positive integer, so (2 / 3) x is a positive integer
From the coprime of 2 and 3, we can see that x is a multiple of 3, so x = 3, y = 2
So the solution of 2x + 3Y = 12 is {x = 3, y = 2}
① Please write a set of positive integer solutions of equation 2x + y = 5
② If 6 / X-2 is a natural number, then the value of X satisfying the condition is______ One
③ If someone bought a notebook with a unit price of 3 yuan and a pen with a unit price of 5 yuan for 35 yuan, what are the purchase options?
Can you write the process?

1、X=1,Y=3
2. There are three: 1, 2, 3
3. Notebook 10 and pen 1, or notebook 5, pen 4

There are 2010 Red, white and yellow beads of the same size, arranged in the order of 5 red, 4 white and 3 black. What color is the 144th bead?

2010÷(5+4+3)=176.6
The 144th bead is white