Answer:
f
(
x
)
=
2
x
+
5
Step-by-step explanation:
Explanation:
Function notation is a system of representing functions.
Functions are special types of relations. If a relation produces exactly one output (
y
) for each input (
x
), then it is called a function.
You can write a relation in function notation by replacing y with f
(
x
)
. This is pronounced "f of x", and means "the value of the function given the input x
.
Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.
Step-by-step explanation:
Since we have given that
Sample size = 400
Mean = $357.75
Standard deviation = $37.89
At 95% confidence level, z = 1.96
We first find the margin of error.
Margin of error is given by
95% confidence interval would be
Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.
Answer:
-2 1/6
Step-by-step explanation:
4(-2 1/3) + 7 1/6
-9 1/3 + 7 1/6
-2 1/6
Answer:
x^2+x + 1/4
Step-by-step explanation:
x^2+x
Take the coefficient of x
1
divide by 2
1/2
Square it
(1/2)^2 = 1/4
Add this to make a perfect square trinomial