The first one is false. Functions can also be other shapes, like parabolas or exponential.
The second is true. If x is 2 then y is also 2.
A. x^4
B. 9r + 16x
C. 37z^8 + 8z
D. 28a^2 - 16b^2
E. 19x^2 - 84x
Answer:
The mean of the total number of students is 85.5
Step-by-step explanation:
REcall that given n data points
, the mean is given by
.
Let us number the students of the 24 students' class from 1 to 24 and the let us number the students of the other class from 25 to 47.
The question is to find the following
![\frac{\sum_{i=1}^{47} x_i}{47}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Csum_%7Bi%3D1%7D%5E%7B47%7D%20x_i%7D%7B47%7D)
REcall the following
![\frac{\sum_{i=1}^{24}x_i}{24} =86](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csum_%7Bi%3D1%7D%5E%7B24%7Dx_i%7D%7B24%7D%20%3D86)
![\frac{\sum_{i=25}^{47}x_i}{23} =85](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csum_%7Bi%3D25%7D%5E%7B47%7Dx_i%7D%7B23%7D%20%3D85)
Then, from this equations we can deduce that
![\sum_{i=1}^{47}x_i = \sum_{i=1}^{24}x_i + \sum_{i=25}^{47}x_i = 86\cdot 24 + 85\cdot 23](https://tex.z-dn.net/?f=%5Csum_%7Bi%3D1%7D%5E%7B47%7Dx_i%20%3D%20%5Csum_%7Bi%3D1%7D%5E%7B24%7Dx_i%20%2B%20%5Csum_%7Bi%3D25%7D%5E%7B47%7Dx_i%20%3D%2086%5Ccdot%2024%20%2B%2085%5Ccdot%2023)
Therefore,
![\frac{\sum_{i=1}^{47} x_i}{47}= \frac{86\cdot 24 + 85\cdot 23}{47}= 85.5](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Csum_%7Bi%3D1%7D%5E%7B47%7D%20x_i%7D%7B47%7D%3D%20%5Cfrac%7B86%5Ccdot%2024%20%2B%2085%5Ccdot%2023%7D%7B47%7D%3D%2085.5)
Answer:
6x -24
Step-by-step explanation:
You just develop :
6(x-4)
6*x - 6*4
= 6x-24
Answer:
A C D is ur answer
Step-by-step explanation: