Answer:
$48.53
Step-by-step explanation:
The purchases can be written in equation form as ...
4v +5f = 352.65
2v +4f = 249.12
Doubling the second equation and subtracting the first gives ...
2(2v +4f) -(4v +5f) = 2(249.12) -(352.65)
3f = 145.59 . . . . simplify
f = 48.53 . . . . . . divide by 3
The price of each football was $48.53.
The spread is controlled by the standard deviation. The mean value only controls where the center of the bell is.
So a normal distribution with a sigma of 9 is wider than one with a sigma of 5.
Answer:
57 kilometers a day.
Step-by-step explanation:
I just divided 513 by 9 and got that.
Answer:
5
Step-by-step explanation: