Can you guys help me out pls
1 answer:
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Answer:
Hence the probability that the mean of their utility bills will be less than $75 = P(X < 75) is 0.9736.
Step-by-step explanation:
Now,
Population mean electric bill, $72
Population standard deviation, $6
Standard error of the mean
The probability that the mean of their utility bills will be less than $75 = P(X < 75)
= P[Z < (75 - 72) / 1.5492]
= P[Z < 1.9365]
= 0.9736 (Using Z table)
4x - 2 = 2x - 10
First, subtract 2x from both sides. / Your problem should look like:
Second, subtract 4x - 2 - 2x to 2x - 2. / Your problem should look like:
Third, add 2 to both sides. / Your problem should look like:
Fourth, simplify -10 + 2 to get -8. / Your problem should look like:
Fifth, divide both sides by 2. / Your problem should look like:
Sixth, simplify
to 4. / Your problem should look like: 
Answer: x = -4
First, subtract 2x from both sides. / Your problem should look like:
Second, subtract 4x - 2 - 2x to 2x - 2. / Your problem should look like:
Third, add 2 to both sides. / Your problem should look like:
Fourth, simplify -10 + 2 to get -8. / Your problem should look like:
Fifth, divide both sides by 2. / Your problem should look like:
Sixth, simplify
Answer: x = -4