Mathematical problems of "system of linear equations with three variables" There are 86 people, each of whom processes 15 parts a or 12 parts B or 9 parts C every day, while 3 parts a, 2 parts B and 1 Part C make up a set. How many people are arranged to process parts a, B and C so that the processed parts can match exactly?

Mathematical problems of "system of linear equations with three variables" There are 86 people, each of whom processes 15 parts a or 12 parts B or 9 parts C every day, while 3 parts a, 2 parts B and 1 Part C make up a set. How many people are arranged to process parts a, B and C so that the processed parts can match exactly?

Set, arrange a, B, C three parts respectively for X, y, Z people
x+y+z=86
15X：12Y：9Z=3:2:1
Namely:
x+y+z=86
6y=5x
3z=2y
9z=5x
The solution is as follows
x=36
y=30
z=20
Arrange 36, 30 and 20 persons for a, B and C parts respectively

If f (x) = f (x + 1), x4, then f (log2 ^ 3) =?
This is a piecewise function,

Because log2 ^ 3 < 4 and log2 ^ 16 = 4, f (log2 ^ 3) = f (log2 ^ 3 + 1) = f (log2 ^ 6 + 1) = f (log2 ^ 12) = f (log2 ^ 12 + 1) = f (log2 ^ 24). Because log2 ^ 24 > 4, f (log2 ^ 24) = 2 ^ (log2 ^ 24) = 24

1.（2m+2)(______） =4n*n-m*m
2. If the value of formula 2A * a + 3A + 1 is six, then the value of formula 6A * a + 9A + 5 is six_______
3.(x-2)(x*x*x*x+16)(x+2)(x*x+4)=_______

I don't know
2 20
3 x^8-256

Someone wrote me such a formula: (209-150) / 150 * 100% = 39.3%. What does the middle / mean, multiply or add

Division sign. Equivalent to △

How to distinguish between in and ing?

"Hard" sound
such as
Rooting: reading "entering the WTO"
There are no simple rules for the pronunciation of in
The pronunciation depends on the position of the letter in
Read "cause" only
Read "cause" at the beginning of "in", such as "Yin Tu" at the beginning of "in"
"Yin" at the end of "in", for example, "Di Yin" at the end of "in"
Wine's in
Wind's in reading "cause"
Grind's in reading "ain"
In addition, in spoken Southern America, the ending of "ing" is often read as "in"
For example, smoking means "smoke."
To hear the correct pronunciation, use the link below
Input the correct English spelling, click "Baidu translation", and then click the audio speaker icon to listen to the pronunciation:
I hope it helps you,

On chord length formula
It's the chord length formula of the inner root sign 1 + K ^ 2 | x1-x2 | I want to know what its applicable scope is. Can we use this formula to calculate the chord length for elliptic parabola and hyperbola?

As long as it's two points on a line with a given slope k,
The distance can be calculated with this formula. You can use the distance formula between two points!
Because it is usually used to calculate the chord length of a straight line cut by a conic, it is called chord length formula

Primary school sixth grade formula urgent!

Primary school mathematics formula: 1, rectangle circumference = (length + width) × 2, C = (a + b) × 22, square circumference = side length × 4, C = 4A 3, rectangle area = length × width, s = AB 4, square area = side length × side length, s = a

How to solve the logarithm equation lgx = 2 = Lg3

Is the title wrong? Lg3 = 2?

The side length of the large square is m cm, and that of the small square is n cm
 

Perimeter: n plus the sum of the difference between M and N divided by 2 multiplied by 4 plus m plus the sum of the difference between M and N divided by 2 multiplied by 4
Area: square of M minus square of n
I'm not sure if it's a bit confusing

Is that what peach and plum all over the world, where there are good + points to praise teachers

The teacher's spring breeze bathes my heart day by day
A good teacher is better than ten thousand books
Dear teacher, your sincere love wakes up a lot of confusion, nurtures a lot of self-confidence, ignites a lot of youth and destroys a lot of sails
Silver silver hair reflects the sun and the moon, red heart blood Wo new flowers
One day as a teacher, one life as a father
The gift of words, all my teacher also
Gardener, lofty title, I wish you peach and plum all over the world, spring everywhere
Rivers push us to the vast sea, dawn brings us beautiful morning; dear teacher, you lead us to magnificent life
Teacher, it is said that you are the pillar of our country. It is you who support our generation
1. If he is upright, he will act without command; if he is not upright, he will not obey command
——Confucius
2. Example is more important than words
——Wang Fuzhi
3. If you want students to be studious, you must be studious. Only those who are not tired of learning can teach students who are not tired of learning
——Tao Xingzhi
4. What students are required to do should be done by the staff in person; what students are required to learn should be learned by the staff in person; what students are required to abide by should be observed by the staff in person
——Tao Xingzhi
5. Those who move with words have no deep feeling; those who move with walkers should be quick
——Li Zhi
6. The only source of students' respect for teachers lies in their virtue and talent
——Einstein
7. A teacher's personality is everything to an educator. Only a healthy mind can have healthy behavior
——Ushinski
8. The teacher's personal example is the most useful sunshine that nothing can replace for young people's mind
——Ushinski
9. If a teacher lies to his students once, all his educational achievements will be destroyed
——Rousseau
10. You should be what kind of person you want to make students
——Chernishevsky
Not bad. There are famous sayings and poems