Answer:
(2x+1) -(-x^2+3x)
Step-by-step explanation:
r(x) = –x² + 3x
s(x) = 2x + 1
find the difference of (s-r)(x)
(s- r)(x) = s(x) - r(x)
we are given with s(x) and r(x)
to find the difference we plug both functions
(s- r)(x) = s(x) - r(x)
distribute negative sign inside the parenthesis
(2x+1) -(-x^2+3x) is the way we find difference
Answer: E. none of the above
Step-by-step explanation:
The given data values that represents the population:
2, 6, 3, and 1.
Number of values : n=4
Mean of the data values =
Sum of the squares of the difference between each values and the mean =
Now , Variance = (Sum of the squares of the difference between each values and the mean ) ÷ (n)
= (14) ÷ (4)= 3.5
Hence, the variance is 3.5.
Therefore , the correct answer is "E. none of the above".