Hi there!
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I believe your answer is:
"Add 4 to both sides, and then divide by 2. The solution is x = 12."
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Here’s why:
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- To solve for 'x', we would have to use inverse operations.
- We would first have to add four to both sides to undo the negative four. Addition is the opposite of subtraction.
- We would then divide by 2 to isolate 'x'. Division is the opposite of multiplication.
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Hope this helps you. I apologize if it’s incorrect.
Answer: The number of days would be 7 days.
Step-by-step explanation:
Since we have given that
Variance = 30°
Standard deviation = √30 = 5.47
Mean = 4°
At 95% confidence, z = 1.96
So, number of days that the researcher select to measure the temperature would be

Hence, the number of days would be 7 days.
Answer:
x ≤ 10
Step-by-step explanation:
The sign that I used means less than or equal to. So that means that there can either be 10 people exactly, or less than 10 people.
N would be 6 for this one