The original price of a kind of clothing is 120 yuan, but now the price is reduced by 20%. What's the current price

Current price: 120 times 0.8 is 96 yuan

There is a dress in a clothing store. It is sold at the original price on the first day, but no one comes to buy it. The next day, it is 10% off, but no one comes to buy it. On the third day, it is reduced by 120 yuan. The price is exactly 66% of the original price. How much is the original price of this dress?
Give me a lecture if you have good conditions

90％-66=24
120 △ 24% = 120 △ 0.24 = 500 yuan
The original price of this dress is 500 yuan
You just need to find the same quantity. Come on!

8. The greatest common factor of 16 and 20 is () and the least common multiple is ()

The first is 4, the second is 160

What is the ratio between X and y if 2x of 5 = 3Y of 4 (x.y is not equal to 0)
It has to be done today

2x/5 = 3y/4
2x/3y = 5/4
2x/y = 15/4
x/y = 15/8
x :y = 15 :8

If the rational numbers a and B satisfy | ab-2 | + | 1-B | = 0
Try to find 1 / AB + 1 / (a + 1) (B + 1) + 1 / (a + 2) (B + 2) + +1 / (a + 2007) (B + 2007)

If a sequence is not only an arithmetic sequence but also an arithmetic sequence, must it be a non-zero constant sequence? What if it is 1,2,4?
It is true that the concept of sequence does not require more than three numbers to be called sequence, but in the concept of equal ratio sequence and equal difference sequence, it is intangibly required that the sequence must be more than three numbers to be called equal ratio sequence or equal difference sequence
If the difference between each term and its previous term is equal to the same constant, then this sequence is called arithmetic sequence
The ratio of each term to its previous term is equal to the same constant, so the sequence is called equal ratio sequence
According to the concept, if there are only two numbers, then there is only one difference (or ratio)
Therefore, the equal ratio sequence and the equal difference sequence must have more than three numbers
Therefore, the sequence can only be non-zero constant sequence
We can set X, sequence equation to prove, but the process of proving is very complicated. If we think about it well, we can know that only the non-zero constant sequence can meet the two conditions
This is what you answered before. I still don't understand
What if the sequence is 1, 2, 4?

The difference between 2 and 1 is 1, and the difference between 4 and 2 is 2, which is equal but not equal

The following function, which is an increasing function in the interval (0, + ∞), is ()
A. y=ln（x+2）B. y＝−x+1C. y＝(12)xD. y＝x+1x

A. Y = ln (x + 2) is an increasing function on (- 2, + ∞), so it is an increasing function on (0, + ∞), a is correct; B, y = − x + 1 is a decreasing function on [- 1, + ∞); excluding BC, y = (12) x is a decreasing function on R; excluding CD, y = x + 1x is a decreasing function on (0,1), increasing function on (1, + ∞), excluding D, so a is selected

Spherical solutions of linear equations with three variables
two
{X:Y=3:2
{Y:Z=5:4
{X+Y+Z=66

Suppose K method
Let X be 3k, then y be 2k and Z be 8 / 5K
Then 3K + 2K + 8 / 5K = 66
The solution is k = 10
So x = 30, y = 20, z = 16

“1,2,3,5,8,13,21,34,55,89,144…”
This is an interesting Fibonacci series in mathematics_____ (in your own words)

From the third number, each number is equal to the sum of the two numbers before it

Which is the greater of the sixth power of X + 1 or the fourth power of X + the second power of X

X ＾ 6 + 1 = (X & sup2; + 1) (x ＾ 4 -- X & sup2; + 1) x ＾ 4 + X & sup2; = x & sup2; (X & sup2; + 1) so x ＾ 6 + 1 - (x ＾ 4 + X & sup2;) = (X & sup2; + 1) (x ＾ 4-x & sup2; + 1-x & sup2;) = (X & sup2; + 1) (X & sup2; - 1) & sup2; because X & sup2; + 1 is always positive, (x ＾ sup2; + 1

The original price of a kind of clothing is 120 yuan, but now the price is reduced by 20%. What's the current price