If the monomial - 2x ^ A * y ^ 3 is the same as 1 / 4x ^ 3 * y ^ B, then a ^ B=____

If the monomial - 2x ^ A * y ^ 3 is the same as 1 / 4x ^ 3 * y ^ B, then a ^ B=____

Because the monomial - 2x ^ A * y ^ 3 is the same as 1 / 4x ^ 3 * y ^ B
So a = 3, B = 3, then a ^ B = 27
The exponents of the same letters of the same kind are equal

If the monomial 5A ^ 4 times B is the same as 2A ^ 2x times b ^ y, the sum of them is_____ ,X+y=____ .

If the monomial 5A ^ 4 times B is the same as 2A ^ 2x times b ^ y, the sum of them is 7a ^ 4b, x + y=___ three
x=2,y=1

A mathematical problem of finding regularity
one
2 3
4 5 6
7 8 9 10
.
What is the seventh number in line 2004——
Please explain the reason or algorithm

The last number in line n can be expressed as 1 + 2 +... + n
So the last one in line 2003 is 1 + 2 +... + 2003 = 2007006
So the seventh number in line 2004 is 2007006 + 7 = 2007013

1. A certain commodity is priced at 50% of the purchase price. After the price is increased, write down the reward and sell it at 80% of the price. Suppose that each commodity still makes a profit of 20 yuan, how much is the purchase price of this commodity?
2. Uncle Liu rides a bicycle from city a to city B. he travels 15 kilometers per hour by bicycle. When he comes back, he takes a taxi and travels 60 kilometers per hour (I don't know where his bicycle is). When he takes a taxi, he uses 4.5 hours less than a bicycle. He asks for a distance of several thousand meters between city a and city B
To put it simply-

Suppose the purchase price of this commodity is x yuan
（50%+1）X*80%-X=20
0.2X=20
X=100
The purchase price of this commodity is 200 yuan
2. It took x hours to set up a taxi
15（X+4.5）=60X
15X+67.5=60X
X=1.5
1.5 * 60 = 90 km a: the distance between a and B is 90 km

What is the content of Article 56 of the road traffic safety law of the people's Republic of China?
There's a parking ticket on it

150 and 91 common factors

Because 91 is prime, the common factor of 150 and 91 is 1

The length of the generalized table (((a, B, (), c), d), e, ((f), g)) is____ The depth is____ ..
RT

The length of the generalized table is the number of commas in the first bracket
We can see that there is only one element, that is ((a, B, (), c), d), e, ((f), g)
So the length is one
The depth is the number of brackets, and the depth is 4

Unit 7 page 56 3A translation in new target English

I don't like waiting in line when the waiter is on the phone. When this happens, I usually say, "can you help me?" and I don't like the store attendant following me all the time. I say, "can you stop following me all the time? When I need help, I'll call you." usually the waiter says sorry, But sometimes they get angry. If this happens, I won't go to that store again
When I read a book and someone talks to me, I get angry. In the school library, I often encounter this kind of thing. When it happens, I talk to others because I want to be polite. But because I'm polite, people don't know I'm angry. So they will do the same thing again. Maybe in the future, I should try not to be so polite

What is the least common multiple of 12 16 28?

12=4*3
16=4*4
28=4*7
Least common multiple = 4 * 3 * 4 * 7 = 336

3.2 to 1.6 = x to 5 x to 1.4 = 2 to 3.5 1 / 100 to 1 / 2 = 2 / 5 to x 36 / x = 1.8 / 5 1 / 2 to 1 0.4 / 25 = x / 75

3.2 vs. 1.6 = x vs. 5x = 3.2 * 5 / 1.6x = 10 x vs. 1.4 = 2 vs. 3.5x = 1.4 * 2 / 3.5x = 0.8 1 / 100 vs. 1 / 2 = 2 / 5 x = 1 / 2 * 2 / 5 * 100x = 2036 / x = 1.8 / 5x = 36 * 5 / 1.8x = 100 0.4 / 25 = x / 75 x = 0.4 * 75 / 25X = 1.2 if there is any help, please take it. Thank you. This is the first answer