Is a bright thing beside the moon a star In Dalian, I can see the bright thing next to the moon every night. Is it a star? And every night there is nothing but that star. If it is a star, what kind of star is it

Is a bright thing beside the moon a star In Dalian, I can see the bright thing next to the moon every night. Is it a star? And every night there is nothing but that star. If it is a star, what kind of star is it

of course!
It's Venus. Venus is now the best time to observe it. It doesn't fall into the southwest until around 9:00 p.m
On January 15, Venus, which is famous for its brightness, will be very bright after a certain distance from the sun, that is, when it is large in the East, it will be like a lamp hanging in the southwest low sky at sunset. After that, it will approach the sun faster. After two or three months, Venus will appear in front of people as the morning star

The number of Mingming's extra-curricular books is 3 / 4 of that of Liangliang. If Liangliang gives Mingming 30 extra-curricular books, they will have the same number of extra-curricular books. How many extra-curricular books does Liangliang have Help me. It's due tomorrow

1-3 / 4 = 1 / 4, 30 * 2 = 60, bright = 60 divided by 1 / 4 = 240 (Ben)

The road from Liangliang's home to the bookstore is 1500 meters long. One day, Liang Liang went to the bookstore to buy a book. He had just walked 200 meters from home and found that he had forgotten to bring money with him. So he went home immediately to get it, and then rushed to the bookstore. Do you know how many meters Liangliang walked from home to the bookstore? (excluding the length of his way home from the bookstore)

1500+200×2
=1500+400
=1900 (m)

Mingming and Liangliang make an appointment to go to the bookstore to buy a book. Liangliang says that if you spend 20 yuan on a membership card, you can enjoy a 20% discount on books. Mingming says yes, I bought it last time Several books, plus the cost of card, but also saved 12 yuan, clear the original price of books last time

(12 + 20) / (1-0.8) = 160 (yuan)

Mingming and Liangliang both want to buy the same story book. Mingming wants to buy this book. The money he has left is 80% of the original Liangliang's purchase of this book. Below! What he has left is 75% of the original. Compare the two men's money

Let it be a yuan and B yuan
(1-80%)a=(1-75%)b
0.2a=0.25b
a:b=0.25:0.2=25/20=5/4

Xinhua Bookstore sold two kinds of books in one day, with a total of 1560 yuan; for the development of agricultural science and technology, books of type B were sent to the countryside and sold for 1350 yuan. If the cost of a and B books were calculated respectively, a book could make a profit of 25% and B book would lose 10%. How much profit (or loss) would the bookstore make in this day

Suppose the cost of a kind of book is x yuan, B kind of book is y yuan
From the meaning of the title
x+25%x＝1560
y−10%y＝1350 ，
The solution
x＝1248
y＝1500 ．
Therefore, the profit (1560 + 1350) - (1248 + 1500) = 162 (yuan)
Answer: this bookshop this day total profit 162 yuan

The bookstore sells 1500 yuan of books of category A in one day, with a profit margin of 25%. Then the total cost of selling a kind of books on this day is_____________ element

1200 yuan
125%x=1500
x=1500/125%、
x=1200

A bookstore went to the book wholesale market to buy some books. For the first time, he bought several books at the wholesale price of 1200 yuan and sold them at 8 yuan, which sold out quickly When 180 copies of the book were sold at 8 yuan, the remaining books were sold at 50% discount. In general, the book store lost money or made money (not taking into account other factors)? If the book lost money, the book was sold at a discount of 50%, How much to lose? How much to earn if you make money

1: For the first time, I used 1200 yuan to buy some books at wholesale price and sold them at 8 yuan
2: In the second purchase, the wholesale price of each book increased by 1 yuan compared with that of the first time, and the bookstore purchased 20 more books with 1540 yuan than the first time
Suppose: the first wholesale price of each book is x, then
1200/x+20=1540/(x+1)
X = 6 (yuan), a total of 200 books
It's sold at 8 yuan per copy, 1600 yuan in total and 400 yuan in profit
The second purchase price is 7 yuan, 220 books
180 copies sold 180 * 8 = 1440 yuan
There are 40 copies left to sell, 40 * 4 = 160 yuan, a total of 1600 yuan, earn 60 yuan
Two times, a total of 460 yuan

The bookstore sold books at 20% discount. My mother bought a book for 15 yuan. How much was the original price of the book?

15 divided by 0.8 is 18.75

A bookstore has a tutorial book priced at 11 yuan, and it still earns 10% after 20% discount. What is the purchase price of this book? Hurry!! I can't figure it out! Please, please!!!!!

11*0.8=8.8
8.8/1.1=8