Organize a spring outing, and rent 8 buses and CMBS, with 60 passengers for each bus and 40 passengers for each CMB. The bus is more than CMB in total How many buses and minibuses are there?

There are x CMB and 8-x bus
60*（8-x)=40x+180
x=3
8-x=5
There are 3 CMBS and 5 buses

Let the value of the common factor ax ^ 3-5 ^ 2 + BX + C / 2x ^ 3-10x ^ 2 + 3x-4 be a constant, and find the value of a, B, C and the value of this algebraic formula

The value is a constant
So the coefficient of the same number is proportional
So a / 2 = (- 5) / (- 10) = B / 3 = C / (- 4)
So a / 2 = B / 3 = C / (- 4) = - 5 / (- 10) = 1 / 2
a=1,b=3/2,c=-2

Given that f (x) is an even function defined on R, and f (X-6) = f (x) + F (- 3), then f (15)=

Solution:
It is known that f (x) is an even function defined on R
f(x-6)=f(x)+f(-3)
That is, f (X-6) = f (x) + F (3)
So f (± 3) = 0
So f (X-6) = f (x)
So the period of F (x) is 6
So f (15) = f (3) = 0

I know, I know, I understand?

I see.
I understand.
I know.

How many minutes and seconds does 5.8 degrees equal

5.8 degrees = 348 minutes = 20880 seconds

When - 1 ≤ x ≤ 0, the maximum and minimum values of the X + 2 power of the function y = 2 and the x power of - 3 times 4 are obtained

The minimum is 1

All English words beginning with H have

hot
hook
hang
high
wait

What is the result of subtracting one from the square of an odd number and why

Even number
Let the odd number be 2N-1 (n is any number)
(2n-1)^2=4n(n-1)+1
Then - 1
Then the number is 2 (2 (2n - 1), and it must be even

The difference and connection between the function f (XYZ) and z = f (XY). In addition, how many dimensions is the function f (XYZ)

The definition of function is that given two nonempty sets a and B, there is a certain relationship F. for any element Y in B, there is an element X in a corresponding to it, that is, y = f (x)
So if you say the function f (XYZ) means y = f (XYZ), then it is thinking; if you mean f (XYZ) = 0, this can be said to be a multivariate equation, then it is three-dimensional. Z = f (XY) is three-dimensional

Simple operation of 13 / 16 times (1 minus 6 / 13)

16/13×（1-13/6）
＝16/13×13/7
＝16/7

Organize a spring outing, and rent 8 buses and CMBS, with 60 passengers for each bus and 40 passengers for each CMB. The bus is more than CMB in total How many buses and minibuses are there?