There are a new batch of books in the bookstore. 90 of them are sold on the first day, accounting for 10% of the total number, and 1 / 4 of them are sold on the second day. How many are sold on the second day? Please,

There are a new batch of books in the bookstore. 90 of them are sold on the first day, accounting for 10% of the total number, and 1 / 4 of them are sold on the second day. How many are sold on the second day? Please,

90 divided by 10% is 900
900 times 1 / 4 equals 225
225 copies

Draw the largest triangle in a rectangle. The area of the triangle is half the area of the rectangle______ (judge right or wrong)

Draw the largest triangle in a rectangle, the bottom of the largest triangle = the length of the rectangle, the height of the largest triangle = the width of the rectangle, the area of the rectangle = length × width, the area of the largest triangle = bottom × height △ 2 = length × width = the area of the rectangle △ 2; so the area of the triangle is half of the area of the rectangle

Look forward to doing sth

expect sb.to do sth.
look forward to doing sth.
hope to do sth.

After cutting off a cuboid 8 cm high, the remaining part is a cube. The surface area of the cube is 320 cm less than that of the original cuboid. Find the surface area of the original cuboid

The length and width of the original cuboid are: 320 ／ 4 ／ 8 = 80 ／ 8 = 10 (CM) 10 × 10 × 6 + 320 = 600 + 320 = 920 (square cm) a: the surface area of the original cuboid is 920 square cm

In the cube abcd-a1b1c1d1 with edge length of 2, M is the midpoint of edge Aa1, and cross section of cube is through C, m and D1
What is the section figure and why?
2. Area of cross section?

It's a trapezoid
Let the midpoint of AB be n, then the cross section is trapezoidal mncd1
This is because Mn / / A1B / / d1c is coplanar with m, N, C and D1
Because the edge length of the cube is 2,
So CD1 = 2 √ 2, Mn = 1 / 2 * CD1 = √ 2,
If MP and CD1 are over P, then d1p = 1 / 2 * (cd1-mn) = √ 2 / 2,
So from Pythagorean theorem, MP = √ (MD1 ^ 2-d1p ^ 2) = √ (5-1 / 2) = 3 √ 2 / 2,
So s section = 1 / 2 * (Mn + CD1) * MP = 1 / 2 * (√ 2 + 2 √ 2) * 3 √ 2 / 2 = 9 / 2

How to make dumpings

How to Make Dumplings
Chinese food is very famous in many countries. One of the most special and traditional food is dumpling. Dumplings are not only tasted good but also easy to make.
The first step is to make the filling. You can choose what you favorite, such as pork, beef, or chicken. Take what you like from the refrigerator, and do not forget to close it. Then chop it up and add some chopped cabbage or green vegetables. Take a big bowl from the cupboard and put all the meat and vegetables in it. You should also put in some seasonings such salt, soy source, pepper, sesame oil, and chopped ginger to get your favorite flavor. But be careful that do not put in too much of it, which would make the dumplings disgusting. And then you can get a pair of chopsticks from the cabinet to stir the filling to evenly mix.
Put the bowl aside and do the second part. Take out the dough pieces you bought from the supermarket. They can also be made by hand, but it is more complicated, so I advice you to buy some from the supermarket. Then is the step of folding the dough pieces to make dumplings. You should hold a dough with your left or right hand and put a suitable mount of filling onto the central part of the piece with another hand. And wrap the piece into half-moon shaped and seal the edges.
In this way you make the dumpling one by one. Then pour about one liter water in a pot and heat it up. When the water is boiling, put the dumplings in it. And after them float in the water, stop the heating and get out the dumplings with a big spoon after two minutes.
In this way, you can enjoy the delicious dumplings. Be careful that you should press the edge of the dumplings firmly, in case the dumplings broke when you cook them.

What are the types of compositions?

Narratives, expository texts and argumentative essays are based on the subject matter of an article, or on the main way of expression used in the article. The main way of expression used in an article is called narratives. The main way of expression used in an article is expository texts. The main way of expression used in an article is argumentative essays

If △ ABC is an equilateral triangle, D is the midpoint of AB, e is on AC, AE: EC = 1:3, then ∠ ade=

30
Make the midpoint F of AC
Connection DF
According to the median line theorem
DF=1/2BC=1/2AB=AD=AE
So triangle ADF is equilateral triangle
Because AE: CE = 1:3
So AE: EF = 1:1
So point E is the midpoint of AF, according to the three lines in one
So De is the bisector of △ ADF angle
Therefore, ADE = 30 degree

Fill in the blanks with the appropriate preposition in / on / under / behind / to / of / next to
A cat is the tree
Many bananas are the tree
Some pictures are the wall
Li Lei is duty today
I can't see the dog.It 's the door
A red bike is the tree
Who's the photo
There is a door the wall
Welcome Hangzhou
This is a photo my family

1. In the tree
2. On the tree
3. On the wall
4. On duty
Behind the door
6. Under the tree
7. In the photo
There is a door in the wall
Welcome to Hangzhou
10. Of my family

It refers to the inability to do something well or solve a problem

It refers to the inability to do a good job or solve a problem
Attract people's attention