Answer:
s = [(4-6)^2 + (7-6)^2 + (4-6)^2 + (10-6)^2 + (5-6)^2] / 5
Step-by-step explanation:
Given the data:
Number of miles biked each day:
X = 4, 7, 4, 10, 5
The mean of data :
Mean(m) = (sum of X) / n
Where n is the number of observations or days
m = (4 + 7 + 4 + 10 +5) / 5
m = 30 / 5
m = 6
The variance of the data (s):
s = [Sum of (x - m)^2] / n
s = [(4-6)^2 + (7-6)^2 + (4-6)^2 + (10-6)^2 + (5-6)^2] / 5
Where s = variance, m = mean, x = data values
Real coefients
if a+bi is a root then a-bi is also a root
since 3-i is a root then 3+i s also a root
also the √7, so if √7 is a root then -√7 is also a root
so
f roots are r1 and r2 then the factored form is
f(x)=(x-r1)(x-r2)
roots are 3-i, 3+i and √7 and -√7
f(x)=(x-(3-i))(x-(3+i))(x-√7)(x-(-√7))
expanded
f(x)=x⁴-6x³+3x²+42x-70
Answer:
C
Step-by-step explanation:
If you subtract 6-2 you get 4 then multiply it by 6 you get 24 then multiply 2 and 2 and get 4 and then get 24 subtract it by 4 and get 20 so the answer is c Sorry i cant explain well but at least you have the answer.
Answer: P = 2
Step-by-step explanation:
18 = 2(p+7)
18 = 2(2P+14)
-14 -14
4 = 2P
2=P
