First we find the mean (or the average)...
average : (82 + 76 + 93 + 82 + 73 + 80 / 6) = 486/6 = 81
now we subtract the average from every data point.....then square the result
82 - 81 = 1.......1^2 = 1
76 - 81 = -5....-5^2 = 25
93 - 81 = 12....12^2 = 144
82 - 81 = 1.......1^2 = 1
73 - 81 = -8.....-8^2 = 64
80 - 81 = -1.....-1^2 = 1
now we find the mean (or average) of those numbers
(1 + 25 + 144 + 1 + 64 + 1) / 6 = 236/6 = 39.33
that is ur variance....to find the standard deviation, take the square root of ur variance.....
square root 39.33 = 6.27 <==
The answer should and must be 37.5 . you get that by dividing 30/80 which equals to 0.375 . Hence the answer times 100 which gets you 37.5
Answer:
Step-by-step explanation:
You will use the FOIL method, which is very similar to the distributive property.
In order to do multiply correctly, multiply the y by 3x, 5y, and -2. You should get:
Then multiply the -4 by 3x, 5y, and -2 where you should get:
By using the foil method, you got rid of the parentheses. Now you can simply combine like terms and get your final answer:
I hope this helps you!
Answer:
Points lie on the same line if and only if the points are collinear
Step-by-step explanation:
Answer:
(a+3)(5a+14)
Step-by-step explanation:
Hope this helps
