Answer:
40%
Step-by-step explanation:
divide the students by the total
22/55
=
P
P
=
0.4 = 40%
What’s this supposed to be?
Answer:
The slope is -1.
Step-by-step explanation:
We want to find the slope of the line that is parallel to the line joining the points (7, -5) and (-5, 7).
First, we can use the slope formula to find the line passing through (7, -5) and (-5, 7). The slope formula is:
![\displaystyle m=\frac{y_2-y_1}{x_2-x_1}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20m%3D%5Cfrac%7By_2-y_1%7D%7Bx_2-x_1%7D)
Substitute and evaluate:
![\displaystyle m=\frac{(7)-(-5)}{(-5)-(7)}=\frac{12}{-12}=-1](https://tex.z-dn.net/?f=%5Cdisplaystyle%20m%3D%5Cfrac%7B%287%29-%28-5%29%7D%7B%28-5%29-%287%29%7D%3D%5Cfrac%7B12%7D%7B-12%7D%3D-1)
So, its slope is -1.
Recall that parallel lines have the same slope.
Therefore, the slope of the line that is parallel to the line joining the points (7, -5) and (-5, 7) will also be -1.
Answer:
Step-by-step explanation:
Total voters = 900
Republicians =369
Democrats =468
Independents = 63
Sample size n =90
a) The expected value of the number of Republicans in the sample is
=![\frac{90*369}{900} =36.90](https://tex.z-dn.net/?f=%5Cfrac%7B90%2A369%7D%7B900%7D%20%3D36.90)
b) The chance the sample contains only Republicans and Democrats is
= (no of republicians+democrats)/total people
=![\frac{369+468}{900} =0.93](https://tex.z-dn.net/?f=%5Cfrac%7B369%2B468%7D%7B900%7D%20%3D0.93)
c)