Magazine ask readers to call in their opinion regarding the amount of advertising in present issue what sampling is it
1 answer:
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Answer:
x=-7
Step-by-step explanation:
7x2-x=7
7x2=14.
14-x=7
When you finished the last step, you will subtract 14 to both sides.
14-x=7
14-14-x=7-14
this will cancel out the 14 on the left.
And will leave you with:
-x=7-14
7-14 is -7.
and this will get you to
-x=-7
To finish this off, you have to turn the negative x/variable, into a positive x/variable.
So, you will divide both sides of the equation by the same term.
-x = -7
into
and it will be -7.
I hope this helps :)
The probability that this bag will be warm enough on a randomly
selected May night at the park is 0.8106 ⇒ answer C
Step-by-step explanation:
You are planning a May camping trip to Denali National Park in Alaska
and want to make sure your sleeping bag is warm enough.
The average low temperature in the park for May follows a normal
distribution
The given is:
1. The mean is 32°F
2. The standard deviation is 8°F
3. One sleeping bag you are considering advertises that it is good for
temperatures down to 25°F (x ≥ 25)
At first let us find the z-score
∵ z = (x - μ)/σ, where x is the score, μ is the mean, σ is standard deviation
∵ μ = 32°F , σ = 8°F , x = 25°F
- Substitute these values in the rule
∴ z =
Now let us find the corresponding area of z-score in the normal
distribution table
∵ The corresponding area of z = -0.875 is 0.18943
∵ For P(x ≥ 25) the area to the right is needed
∵ P(x ≥ 25) = 1 - 0.18943 = 0.8106
∴ P(x ≥ 25) = 0.8106
The probability that this bag will be warm enough on a randomly
selected May night at the park is 0.8106
Learn more:
You can learn more about mean and standard deviation in brainly.com/question/6073431
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