High score questions are urgent in 5 minutes

First of all, you can go to the ** to talk to the teacher, you have to make up your mind to study well, let the teacher help you hide your grades first, and the teacher will understand you.

If you can't do it, go to your parents, and calmly explain to your mother why you didn't do well in the exam this time, and then you must work hard in the future.

I think teachers are generally considerate of their classmates.

Don't be afraid, summarize the reasons why you didn't do well in the exam, tell your parents how you plan to improve your grades in the future, they will understand you, and the teacher will understand you, don't be afraid, it's not a big deal.

The family said that you don't have to talk back about anything, they all said that you know, they see that you recognize, and they probably won't say anything about you, I think you are scared, of course, you also realize it, and naturally pay attention next time, the main thing is whether you know

Nothing else matters.

Unless the high school entrance examination is the college entrance examination

Otherwise, nothing else matters

As long as you don't give up on yourself

Tell parents that it's no big deal!

Now that you have passed the exam, what are you afraid of!

You said that everyone didn't do well in the exam, and the teacher didn't necessarily mention it.

It's useless to avoid the problem, find out the reason why you didn't do well in the test, and do well in the next test.

It's better to take the initiative to find her!

Cone volume = square of radius * * height * 1 3

High definitely. The volume increases by 1+1 3 squared -1 i.e. 7 9

If the height of a cone does not change, the base radius increases by one-third, and the volume increases (by one-third).

The original radius is r and the height is h

After the increase, the radius is 4 3r, and the height is h

v-proto=1 3 r 2h

v = 1 3 (4 3r) 2h

So the volume increased by 7 27 r 2h

Ya Shiju: Yo Yo Deer Song, Eat Wild Apples. I have guests, drummers and shengs. - Xiao Ya Lu Ming".

"Suiyuan of Food: Suiyuan Food List" is written by Yuan Mei, a famous writer in the Qing Dynasty. Yuan Mei is an experienced culinarian. His book "Suiyuan Food List" is an important work in the Qing Dynasty of China that systematically discusses cooking techniques and northern and southern cuisines.

Rice Miao: The god of natural food, back to the truth. Green and pollution-free, clear and mellow for fitness.

The fields are thousands of miles blue, and the sheds are spring. Light rice and coarse tea are full, and green vegetables are precious.

Weihuan Restaurant. Huanxi Sha Su Shi.

The drizzle and the slanting wind make a little cold, and the light smoke is sparse and the willows are beautiful and clear.

Into Huai Qingluo gradually long, snow foam milk flowers floating in the afternoon.

Artemisia shoots try the spring plate, and the taste of the world is refreshing.

By asking where the restaurant is, the shepherd boy pointed to (your store name)!!

Untie the three autumn leaves, and can bloom February flowers.

The willow bank, the wind and the waning moon.

In the order of Dingding, Lily, and red, 3+3+3+5+5+6=25

a=1.If b is not an empty set.

then a+2>=2aa<=2......①

The intersection of a and b is an empty set, and the range of b solution can only be (-1,4), so 2a>-1,a+2<4, and a<=2

Solution: -1 2 < a < 2

If b is an empty set 2a>a+2 then a>2

2.If b is not an empty set a+2<=-1 and a<=2 (see ) or 2a>=4 and a<=2

The solution is a<=-3 or a=2

If b is an empty set 2a>a+2 then a>2

It is easier to understand on the number line.

There's nothing difficult about this, let's use your own brains!

a=(1) is derived from the title.

2a>-1 and a+2<4

The solution gives a = <-3 or a = >2

by a b= , then -12; i.e. by a b = b, then 2a x a + 2 -1;or 4 2a x a+2;i.e. a -3 or a 2

Let B have x grams.

then A is 5x5x-40=x+40

4x=80x=20

It turns out that nail polish 20 * 5 = 100 grams.

B 20 grams.

A is 100g and B is 20g

Let B be x A is 5x to get 5x-40=x+40 x equals 20

It's a very simple question.

Let B have x, then A has 5x

According to the question, the equation is 5x-40=x+40

In the end, we get x=20

Then A has 100 and B has 20

Let A and B be x and y respectively

A is five times that of B, i.e., x=5y

A pours out 40g to B, that is: x-40=y+40

Find y=20 x=100

Solution: Let A = x and B = y, then it is known by the meaning of the question:

x=5y (1)x-40=y+40 (2)

Substitute (1) into (2) to obtain 100g of bottle A and 20g of bottle B.

1) Set the price of X yuan.

3 x 4) The profit is yy

x-3)*[400+40*(4-x)/

800(x-15/4)^2

The visible ** is set at 15 4

That is, the profit is the largest, which is 450 yuan.

At this time, sales were 600 bottles.

Four numbers of four, one more at the end; Five numbers of five, two more at the end, six numbers of six, three more at the end.

Equivalent to: four numbers of four, three less at the end; Five numbers of five are three less at the end, and six numbers of six are three less at the end.

So: the total number is a common multiple of minus 3, i.e. a=60n-3 (n=1,2,3......)

So there are at least 57 of them.

Let the number of shells be x

x-1 is a multiple of 4, then x+3 is also a multiple of 4.

x-2 is a multiple of 5, then x+3 is also a multiple of 5.

x-3 is a multiple of 6, then x+3 is also a multiple of 6.

x+3 is a common multiple of .

The least common multiple is 60

So x+3=60

x is 57

Hello you can find that if these shell numbers plus 3 is the common multiple of .

So take the least common multiple of 60

These shells 60-3 = 57 pcs.