Solve the system of equations below.
2 answers:
Answer:
Option B is correct
(9, 3)
Step-by-step explanation:
Given the system of equations:
.....[1]
......[2]
Multiply equation [1] by 2 both sides we have;
.....[3]
Subtract [3] from [2] to eliminate x we get;
Combine like terms;
or
y = 3
Substitute in [1] we have;
x-2(3) = 3
x -6 =3
Add 6 to both sides we have;
x = 9
Therefore, the solution for the given system of equations is, (9, 3)
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SOLUTION:
Step 1 :
In this question, we are told that a marketing research company needs to estimate the average total compensation of CEOs in the service industry.
We also have that: Data were randomly collected from 38 CEOs and the 98% confidence interval was calculated to be ($2,181,260, $5,836,180).
Then, we are asked to find the margin error for the confidence interval.
Step 2:
We need to recall that:
It means that:
where,
putting the values into the equation for the margin of error, we have that:
CONCLUSION:
The margin error for the confidence interval is 1, 827, 460