Solve the system of equations and choose the correct orderd pair 4x-2y=-2 and 6x+3y=27
1 answer:
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Answer:
The sample size needed to be taken is approximately 74.
Step-by-step explanation:
To get alpha; we have 1 - 0.95 = 0.05
Therefore,
The we look up z* in a Standard Normal table where α = 0.025 area in each tail.
From the table, z* = 1.96
From the question variance is 484, then the standard deviation is 22
Standard deviation =
And margin of error is 5 or less
The formula for margin of error is given as:
margin of error =
The approximate value of n is 74.
Answer:
y·cos73°= x
Step-by-step explanation:
To find this, we can begin by looking at the steps to solve this problem. We know that this involved the 'opposite' and 'adjacent' sides, meaning we must use 'cos' in this instance.
We can set up an equation like this:
cos73°= .
We can simply rearrange this to form a possible answer choice:
y·cos73°= x.
This is one of the answer choices! That is your final answer.