In the tree planting activity in March, there are 10 trees less than twice. How many trees do the students of grade 5 and 6 plant each

In the tree planting activity in March, there are 10 trees less than twice. How many trees do the students of grade 5 and 6 plant each

If there are x trees planted in the fifth grade, then there are 1.2x - 10 trees planted in the sixth grade
1.2X -10 - X =6
0.2X =16
X =80
1.2 ×80 -10 = 86

There are three classes in Grade 6 participating in tree planting activities. Among them, class 1 takes up 2 / 5 of the total number of trees, and the tree ratio of class 2 and class 3 is 3:1
How many trees are planted in a class?

The proportion of trees planted in class 2 and class 3 is 1-2 / 5 = 3 / 5
So three classes account for 3 / 5 × 1 / 4 = 3 / 20 of the total
Another three classes planted 24 trees
So the total number of trees = 24 △ 3 / 20 = 160
So a class of 160 × 2 / 5 trees = 64
I wish you a happy study!

First grade mathematics ternary linear equation (urgent, within 15 minutes)
We are still learning the binary first power, the teacher assigned two ternary first power expansion problems (need specific steps to solve the problem)
（1）
y=2x-7
5x+3y+2z=2
3x-4z=4
（2）
4x+9y=12
3y-2z=1
7x+5z=19/4
Please answer in 15 minutes

y=2x-7………………………… (1)5x+3y+2z=2…………………… (2)3x-4z=4………………………… (3) Substituting (1) into (2), we get 5x + 6x-21 + 2Z = 2, then 11x + 2Z = 23, then 22x + 4Z = 46 (4) (3) + (4), we get 25X = 50, we get x = 2, we substitute (3), we get the solution

Sequence 2,1,5,11111,

(2×1)×2+1=5
(1×5)×2+1=11
(5×11)×2+1=111
(11×111)×2+1=2443
So the latter number is 2443

15 decimeters to the third power =? Meters to the third power =? Centimeters to the third power

The third power of 15 decimeters = 0.015 meters = 15000 centimeters

A mathematical problem of finding laws in grade one of junior high school
Observe the order of the following certificates:
3、7、11、15、19
Find out the law and express it in formula. According to the law you found, calculate the position of 2011 in this column

The latter is equal to the former plus 4
The nth number: 3 + (n-1) 4
2011 is 503rd

One column number 1, 1, 2, 3, 5, 8, 13, 21 Starting from the third term, each term is the sum of the first two terms. What is the remainder of the 2000 term divided by 8?

Because the law of the remainder of this sequence divided by 8 is: 1, 1, 2, 3, 5, 0, 5, 5, 2, 7, 1, 0, 1, 1, 1, 2, 3 Its cycle period is: 1, 1, 2, 3, 5, 0, 5, 5, 2, 7, 1, 0; 2000 △ 12 = 166 8. In the cyclic number, the eighth number corresponds to 5, so the remainder of item 2000 divided by 8 is 5. A: the remainder of item 2000 divided by 8 is 5

5.4 cubic meters = how many cubic centimeters = how many cubic decimeters

5.4 cubic meters = 5400000 cubic centimeters = 5400 cubic decimeters

Who can summarize the main points of grammar knowledge in Volume 2 of Grade 8? It's from Shanghai Education Press. What are the main points of grammar knowledge in unit 1 to unit 7? I remember that one of the units is indirect quotation, and the other is past tense

Direct speech and indirect speech
Direct quotation direct quotation is called direct quotation. Direct quotation is usually placed in quotation marks
—“What is it all about?”
- "what is it?"
—“Nothing serious,just a storm in a teacup.”
- "nothing. It's just a fuss."
2. Indirect speech: to use one's own words to convey the meaning of others, or to quote one's own words,
They are all called indirect speech. Indirect speech is mostly expressed in object clauses
Mary said that she received a sugar report this morning.
Mary said she received a love letter this morning
He said that his hands were quite full at that moment.
He said he was very busy at that time
The past continuous tense refers to an action that has been carried out or occurred at a certain time or period in the past. Its form is was / were + v-ing.it is often used with adverbials of time indicating the past, such as last night, last Sunday, etc., or with adverbials of past time guided by when, while, as
Basic Usage
1. The basic usage of the past continuous tense mainly refers to the action in progress at a certain time in the past
He fell asleep when he was reading
The main purpose of using the past continuous tense to express the present is to make the tone euphemistic and polite
I was wondering if you could give me a lift
The past continuous tense is more polite and uncertain than the past continuous tense
3. The past continuous tense is similar to the present continuous tense in expressing emotion. The past continuous tense can also express emotion such as satisfaction, praise, surprise and disgust. It is usually used with adverbs such as always, forever and continuously
They are always quarrelling
The past continuous tense of the verb be
The continuous tense of the verb be can also indicate the past temporary performance or temporary state
He is very friendly
He was being friendly
Supplement: when is followed by the general past tense, and the verb is a non continuous verb. While is followed by the past continuous tense, the verb is a continuous verb
Special Usage
1. When the meaning of the sentence is clear, we can also change both verbs into the past tense
We listened carefully while the teacher read the text.
We all listened carefully when the teacher read the text
2. It means to plan and arrange what will happen in the past. When it is used to express the verb of position transfer such as come, go, leave, start, arrive, it can also be used to express the action that will happen in the past
He told me that he was going soon
He told me that he would leave soon
3. The background of the story
It was snowing as the medical team made its way to the front.
It was snowing as the medical team advanced
4. A new action has just begun
The past continuous tense can be used to introduce a new action, which is a bit like a shot change
Five minutes later,he stood in the doorway smoking a cigarette.
Five minutes later, he was standing at the door smoking
5. The past continuous tense can also echo the "when" structure with unexpected meaning
I was walking in the street when someone called me.
I was walking in the street when someone called me
6. Used to state a cause or as an excuse
She went to the doctor yesterday.She was having a lot of trouble with her heart.
She went to see a doctor yesterday. She had a serious heart attack
7. Used with always, consistently and other words to express emotional color
The girl was always changing her mind.
The girl is always changing her mind
The adverbial of time
This morning, the whole morning, all day, yesterday, from nine to ten last evening, when, while, at that time,. Just now, a moment ago my brother fell while he was riding his bicycle and hurt himself; it was raining when they left the station; when I got to the top of the mountain, the sun was shipping

There are 5 red balls, 8 white balls and unknown yellow balls. If the probability of getting a white ball is one-third, how many yellow balls are there?
Such as the title

Take the yellow ball as X, 5 + 8 + x = 3 × 8, and get x = 11
11 yellow balls