Here is dependence between scores and x-values:
where is the mean, is standard deviation and i changes from 1 to 2.
1. When i=1, then
2. When i=2, then
Now solve the system of equations:
Subtract first equation from the second:
Then
Answer: the mean is 62, the standard deviation is 20.
Answer:
4
Step-by-step explanation:
Answer:
40% discount
Step-by-step explanation:
40% of 20 = 8
20 - 8 = 12
Answer:that hard
Step-by-step explanation:
Answer:
First one is -7, 5
the second one is -7,2
Step-by-step explanation:
its like basketball... you run then jump which means you go across then go up... not sure if you understand but hopefully....