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Juli2301 [7.4K]
3 years ago
7

Evaluate each expression for x = 6 and for x = 3. Based on your results, do you know whether the two expressions are equivalent?

Mathematics
1 answer:
cluponka [151]3 years ago
6 0

You can't add the same number to 2 different numbers and get the same answer, so no.

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The standard deviation of the sampling distribution of the sample mean is $115,000. The population standard deviation was $25,00
Zina [86]

Answer:

0.31084

Step-by-step explanation:

When given a question where by a random sample is chosen for the population, the z score formula used =

z = (x-μ)/Standard error

where x is the raw score

μ is the population mean

Standard error = σ/√n,

σ is the population standard deviation

n = number of samples

For x = $114,000, μ = $115,000, σ = 25,000, n = 100

z = (x-μ)/Standard error

= z = (x-μ)/ σ/√n

z = 114,000 - 115,000/ 25,000/√100

= -1000/25,000/10

= -1000/2500

z = -0.4

Determining the probability value from Z-Table:

P(x = 114000) = P(z = -0.4)

= 0.34458

For x = $116,000, μ = $115,000, σ = 25,000, n = 100

z = (x-μ)/Standard error

= z = (x-μ)/ σ/√n

z = 116,000 - 115,000/ 25,000/√100

= 1000/25,000/10

= 1000/2500

= 0.4

Determining the Probability value from Z-Table:

P(x = 116000) = P(z = 0.4)

= 0.65542

The probability that the sample mean selling price was between $114,000 and $116,000 is calculated as

= P(114,000< x < 116,000)

= P(-Z<x<Z)

= P(-0.4<x< 0.4

= 0.65542 - 0.34458

= 0.31084

Therefore, the probability that the sample mean selling price was between $114,000 and $116,000 is 0.31084

5 0
3 years ago
Lee is selling spirit wear for a
rewona [7]

Answer:

Lee sold 16 hats

Step-by-step explanation:

16*8=128

12*12=144

128

+ 144

$272

8 0
3 years ago
Read 2 more answers
Math Escape Level 3 plz hurry it is due to today bestie
fenix001 [56]

Answer:

1

Step-by-step explanation:

x-9=-8

x=-8+9

x=1

8 0
3 years ago
If the population of a certain city increased 25% in two years, the new population was what percent of the old?
disa [49]

Answer:

125%

Step-by-step explanation:

This because if in origin the city was made up for example by 100,000 people, that was the 100% of the city. Now you add the 25% in two years and the city will be made by 125,000 people. So <em>100%+25%=125%</em><em>.</em><em> </em>

I think it's right

7 0
3 years ago
Place the following temperatures in order from coldest to hottest: -8°C, 10°C, -5°F, 40°F
vova2212 [387]
-5f, -8c, 40f, 10c happy math..ing
6 0
3 years ago
Read 2 more answers
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