·What is the original price of a commodity that has been reduced by 10% twice in a row and B commodity that has been increased by 10% once in a row and later sold for M yuan

·What is the original price of a commodity that has been reduced by 10% twice in a row and B commodity that has been increased by 10% once in a row and later sold for M yuan

B: M / (1 + 10%). A: M / (1 + 10%) * (1 + 10%) * (1 + 10%) = m (1 + 10%)

After two consecutive price cuts of 20% for a commodity, now it's 144 yuan per piece, the original price______ Yuan

144 ^ [(1-20%) × (1-20%)] = 144 ^ [(1-20%) × (1-20%)], = 144 ^ [80% × 80%], = 144 ^ 64%, = 225 yuan. Answer: the original price is 225 yuan. So the answer is: 225 yuan

The price of a pair of leather shoes is 112 yuan after two consecutive price cuts of 1 / 5. How much is the original price of this pair of leather shoes?

(1-1/5)x(1-1/5)=16/25
112 △ 16 / 25 = 175 yuan
The original price is 175 yuan

Why does leakage switch trip at the same time?
The residual leakage action current is 150mA, the residual leakage non action current is 75ma, and the leakage action time is 0.2S. The secondary box is air switch. The residual leakage action current of the tertiary box is 30mA, the residual leakage non action current is 15mA, and the leakage action time is 0.1s, Why do the leakage switches of the first level cabinet and the third level box trip at the same time?

The sensitivity of primary switch is higher than that of secondary switch, so the leakage current of primary switch can be increased

How to test the simple equation of fifth grade mathematics

Inspection:
Take x =? Into the original equation
Left =?
Right =?
Left = right
X =? Is the solution of the original equation

Write an English essay to introduce Mr. Li. The requirements are as follows
1. Miss Li has a round face, big eyes, small nose and long black hair;
2. Miss Li teaches us English. She is a good teacher;
We all like her very much;
Requirements: do not translate word for word, sentence coherence, not less than 5 sentences

Miss Li has a round face where there are two big eyes and a cute nose .Apart from these, she wears long and black hair . She is a respected teacher who teaches our english.Both of us...

An isosceles triangle, its vertex degree is 2 times of a base angle. What are the vertex and base angles of this triangle?

Let the base angle of a triangle be x degrees, then the top angle of the triangle is 2x degrees. X + X + 2x = 180 ° & nbsp; & nbsp; & nbsp; & nbsp; 4x = 180 ° & nbsp; & nbsp; & nbsp; & nbsp; X = 45 ° 45 ° × 2 = 90 ° A: the top angle of the triangle is 90 ° and the bottom angle is 45 °

Mr. Li can grade 4 compositions with 56 points. At this speed, how long does it take to grade 7 compositions?

Time to write a composition: 56 △ 4 = 14 (points)
Time for writing seven essays: 7 × 14 = 98 (points)
So it takes 98 minutes
Hope to adopt

Guangming primary school has 360 boys, 40 less than 2 times of girls. How many girls are there? Please use the equation to solve

Analysis: set the female student as X person, according to the meaning of the question, we can get the equation
Set: the number of female students is X
2x-40 = 360 people
2X=400
X=200
A: there are 200 girls

It takes Mr. Li 25 minutes to finish an article, and now 64% of it has been finished. How many minutes does it take Mr. Li to finish this article?

25-25*64%
=25-16
=9
It will take Mr. Li nine minutes to finish typing this article
I hope I can help you