Consider the equation a(4−x)=−3x+b. What values of a and b make the solution of the equation x=−5?
1 answer:
You might be interested in
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.