There are 3600 books in the library of science and technology, 1 / 6 of which are comic books, 2 / 5 of which are story books, and the rest are science and technology books 3600 × 2 / 5 3600 × (1 / 6 + 2 / 5) 3600 × (2 / 5-1 / 6) 3600 × (1-6 / 1-5 / 2) 3600 × (1-1 / 6)

There are 3600 books in the library of science and technology, 1 / 6 of which are comic books, 2 / 5 of which are story books, and the rest are science and technology books 3600 × 2 / 5 3600 × (1 / 6 + 2 / 5) 3600 × (2 / 5-1 / 6) 3600 × (1-6 / 1-5 / 2) 3600 × (1-1 / 6)

3600 × 2 / 5, how many story books are there
3600 × (1 / 6 ＋ 2 / 5) how many comic books and story books are there
3600 × (2 / 5-1 / 6) how many more story books than comic books
How many scientific and technological books are there
3600 × (1-1 / 6) how many story books and science and technology books are there in total

There are 320 popular science books in the school, accounting for two fifths of all books. Popular science books are equivalent to four thirds of story books. How many books are there in the library

There are 320 popular science books in the library, accounting for two fifths of all books. Popular science books are equivalent to four thirds of story books. How many books are there in the library
The library has 320 popular science books, accounting for two fifths of all books
Popular science books are equivalent to four thirds of story books
How many books are there in the library?
How many storybooks are there in the library?

320 divided by 2 / 5 = 800 copies
320 divided by 4 / 3 = 240 copies
So there are 800 books and 240 story books in the library

There are 800 story books in the library. The number of science and technology books is 58 of story books and 25 of comic books. How many comic books are there?

A: there are 1250 comic books

As shown in the figure, given that the graph of functions y = 2x + B and y = ax-3 intersects at points (- 2, - 5), then according to the graph, we can get that the solution set of inequality 2x + b > ax-3 is___ ．

If the graph of the function y = 2x + B and y = ax-3 intersects at points (- 2, - 5), then the solution set of the inequality 2x + B ＞ ax-3 is x ＞ - 2, so the answer is x ＞ - 2

5 out of 12 and 7 out of 18

The least common multiple of 12 and 18 is 36, then
5/12 =15/36
7/18 =14/36

If 34% of the dirt can be removed each time when washing clothes with clean water, write out the functional relationship between the remaining dirt and the number of rinsing times. If the remaining dirt does not exceed 1% of the original, how many times should the clothes be rinsed at least?

Let the original dirt be a, and the remaining dirt be y after n times of rinsing. From the meaning of the title, we can know: the remaining dirt Y1 = (1-34) a = 14a after one time of rinsing, y2 = (1-34) 2 · a = 142a after two times of rinsing After washing n times, the remaining dirt yn = (1-34) Na = 14na, if the remaining dirt does not exceed 1% of the original one

7 times 9 = 63, 8 times 8 = 64, 11 times 13 = 143, 12 times 12 = 144, what's the rule

The square of a natural number is equal to the product of two natural numbers plus one

The common factor of polynomial x square minus two, x minus three and x square minus 6x plus nine is ()

X^2-2x-3=(x-3)(x+1)
x^2-6x+9=(x-3)^2
So their common factor is (x-3)
I hope it will help you

1. Here is a box of matches and an alcohol lamp. Please design an experiment to prove the flame temperature of the alcohol lamp?
2. If we want to prove that the main substance in the center of the flame is not the product of alcohol combustion, carbon dioxide and water, but alcohol vapor, how to design the experiment

1. Insert the match stem horizontally into the flame, take it out about 2 seconds later, you can see that the scorch degree of the match stem is different. From the scorch degree of each direction of the match stem, you can know that the temperature of the outer flame is the highest, the temperature of the inner flame is the second, and the temperature of the flame core is the lowest
I haven't learned yet