Answer:
(a) σ² = 144
(b) s² = 12
Step-by-step explanation:
(a) Population variance σ² = ∑(X - 
)² / N
The arithmetic mean 
σ² = 
= 
= 
= 
σ² = 144
(b) 
= 12
Answer:
23
Step-by-step explanation:
7 - 5p + 3q
p = 1, q = 7
Substitute in the values of "p" and "q", and solve;
7 - 5(1) + 3(7)
7 - 5 + 21
2 + 21
23
Answer:
-45
Step-by-step explanation:
Answer:
Huh
Step-by-step explanation:
Answer:
$35 dollars
Step-by-step explanation:
So we know that 3 rides costs $21. If you then take 21/3 you get 7, you're then going to take 7x5 and you will get 35. Therefore 5 rides on the MoonCoaster cost $35. Hope this helps!
