If the square of x plus the square of Y equals 1, then a equals () B equals () C equals () focal coordinate () focal length is ()

If the square of x plus the square of Y equals 1, then a equals () B equals () C equals () focal coordinate () focal length is ()

3,1, double root 2, (0, double root 2), (0, negative double root 2), quadruple root 2

Let f-f 2 be the left and right focal points of the ellipse where the square of x plus the square of Y equals one

Elliptic equation: x ^ 2 / 4 + y ^ 2 = 1
So a = 2, B = 1, C ^ 2 = a ^ 2-B ^ 2 = 3, C = ± √ 3, so the focus is (- √ 3,0) (√ 3,0)

The two focal coordinates of the ellipse where the square of quarter x plus the square of third y equals one are?

x²/4+y²/3=1
So a & sup2; = 4, B & sup2; = 3
c²=a²-b²=1
c=1
4>3
So the intersection is on the X axis
So (- 1,0), (1,0)

In the tree planting activities, the number of trees planted in Grade 6 is 10 times less than that in Grade 5, and the number of trees planted in Grade 5 is 62 less than that in Grade 6?

Let x trees be planted in the sixth grade, then (x-62) trees be planted in the fifth grade

Fifth and sixth grade to plant trees, sixth grade plant is 3 / 4 of the total, less than 24 trees, how many of these trees?
I don't want equations!

Don't worry too much about the equation. It's very simple
There are x classes in total
3/4x-24+3/2(3/4x-24)=x
3/4x-24+1/2x-16=x
1/4x=40
x=160
A: there are 160 trees in this batch

Three classes of grade 6 participated in tree planting activities, among which class 1 planted trees, accounting for two fifths of the total. The tree planting ratio of class 2 and class 3 was 3:1,
Given that there are 24 trees planted in the three classes, how many trees are planted in the three classes?

The number of trees planted in class 2 and class 3 accounted for 20% of the total
2 out of 1-5 = 3 out of 5
The number of trees planted in the third class accounts for 70% of the total
3 / 5 △ (3 + 1) × 1 = 3 / 20
The three classes planted trees together
24 △ 3 / 20 = 160 (trees)

Three classes in Grade 6 take part in tree planting activities. Class 1 plants 39 trees, class 2 plants 2 / 3 of that of class 1, and class 3 plants 1 / 13 more trees than Class 2. How many trees do class 3 plant?

The number of trees planted in the second class is 39x2 / 3 = 26
The number of trees planted in the third class is 26x1 / 13 = 2
Don't understand can ask!
thank you!

The students of three classes in Grade 6 take part in tree planting activities. There are 45 trees in class 1, 8 / 9 trees in class 2 and 8 / 9 trees in class 3
One fifth more than class two. How many trees are there in class three?

45*(8/9)*(1+1/5)=48

On May 12, 2008, Wenchuan, Sichuan Province, a magnitude 8.0 earthquake occurred. Teachers and students of a middle school voluntarily donated 4800 yuan on the first day. The number of people who donated on the second day was 50 more than that on the first day, with a total of 6000 yuan. The number of people who donated on the two days was equal. What was the total number of people who donated on the two days? What was the number of people who donated on the second day
Fractional answer!

Let the number of people in the first day be an unknown number. The key description is: the number of donations per capita in two days is equal. The equivalent relationship is: 4800 ／ the number of people in the first day = 6000 ／ the number of people in the second day. Solution 1: let x people donate in the first day, then (x + 50) people donate in the second day

How much is the total donation in the Wenchuan earthquake?

At 14:28:04 on May 12, 2008, a 8.0 magnitude earthquake occurred in Wenchuan County, Sichuan Province. According to the report of the Ministry of civil affairs, as of 12:00 on May 27, 67183 people have been killed, 361822 injured and 20790 missing in the Wenchuan earthquake