Given that the m-th power of a = - 6, the n-th power of a = 24, then the 3m-n power of a =?

Given that the m-th power of a = - 6, the n-th power of a = 24, then the 3m-n power of a =?

-9
The 3M power of a = - 6 and the 3rd power of a = - 216
3m-n power of a = - 216 / 24 = - 9

Three tree planting teams, the first team planted x trees, the second team planted 25 trees less than twice of the first team's trees, and the third team planted 42 trees more than half of the first team's trees. When x is the following values, how many trees are planted in three pairs
1.x=100
2.x=240

When x = 100, the second team = 100 * 2-25 = 175 (trees), the third team = 100 / 2 + 42 = 92 (trees), then the three teams are 100 + 175 + 92 = 367 (trees);
When x = 240, the second team = 240 * 2-25 = 455 (trees), the third team = 240 / 2 + 42 = 162 (trees), then the three teams are 240 + 455 + 162 = 857 (trees)

How to write
1. What's the price of each a yuan jacket after 20% reduction?
2. P yuan per kilogram of apple, 10% discount for more than 10kg, how much should I pay for 15kg?

1、80%*a
2、15*P*90%

Observe the arrangement of the following numbers: 1, - 4,9, - 16,25. Then the nth number should be - (expressed by an algebraic expression containing n)

an=-（-1）^n*n^2

The second power of 2a is multiplied by the third power of - 8a and the sixth power of B=

-16a^5b^7

It's the multiplication of 2.3 rational numbers

We just did it
1. (multiplicative exchange rate) (multiplicative combination rate)
2.1.（30）2.（9.6）3.（－15）4.（－1）
3.1.（1） 2.（－5）
240-240 × 1 / 3-240 × 1 / 4 = 100 (pieces)
5.1.（－9100）2.（－7241）3.（－60）
5 possibilities, 50 possibilities

If the positive and even numbers are arranged in the following table, then 206 should be in the row and column
If the positive and even numbers are arranged in the following table, 206 should be in - row, - column 1, column 2, column 3, column 4, column 5
The first line
The second line 16 14 12 10
The third line 18 20 22 24
30 32 28 26

206=8*25+6
So the number of rows is 26
You can get 25 lines of numbers: 194196198200
The 26 row array is 208 206 204 202
So it's in column 2
206 in line 26, column 2

What is the sum of all multiples of 15 within 100

15+30+45+60+75+90=315

The application questions and answers of the sixth grade percentage

1. There are 80 bottles of coke in the store. The number of bottles of coke is one fifth less than that of Sprite. How many bottles does sprite have? Sprite has 80 / (1-1 / 5) = 100 (bottles) 2. A train from Shanghai to Tianjin has traveled 808 kilometers, and there is still one third left. How long is the railway from Shanghai to Tianjin? The railway from Shanghai to Tianjin is 808 / (1-1 / 3) = 1212 (kilometers)

There are four red, yellow and blue balls of full size in the box. There must be three balls of the same color if you want to touch them. How many balls should you touch at least?

Consider the worst case:
The first six balls are 2 red, 2 yellow and 2 blue
At this point, touch a ball, can ensure that there are three of the same color
So touch at least 7 balls