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svetoff [14.1K]
3 years ago
15

Now that you have selected the correct unit above, what is the value of x?

Mathematics
1 answer:
charle [14.2K]3 years ago
4 0
Honey we can’t answer the question if we don’t know the problem.
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Assuming a normal distribution, families spends an average of $500 on their monthly cell phone bills with a standard deviation o
lara [203]
The probability is 0.69.

We find the z-scores that correspond with each end of the range we're looking for.  To find a z-score, we use the formula:
z=\frac{X-\mu}{\sigma}
\\
\\=\frac{350-500}{75}=\frac{-150}{75}=-2

z=\frac{400-500}{75}=\frac{-100}{75}=-1.33

Using a z-table (http://www.z-table.com) we see that the area under the curve left of the score 350 would be 0.228.  The area under the curve left of the score 400 would be 0.918.  To find just the range between 350 and 400, we subtract the area left of 350 from the area left of 400; this will give us just from 350 to 400:

0.918-0.228 = 0.69.
8 0
3 years ago
How to determine if something is a linear transformation?
Hatshy [7]
A linear transformation is a function T:R^n-->R^m that satisfies the following properties 
1.T(x+y)=T(x)+T(y)
2.T(ax)=aT(x)
i hoped this helped i honestly tried . let me know if im missing something 
5 0
3 years ago
Order of numbers from greatest to least using negative 9.7 and -9
PtichkaEL [24]

Answer:

-9, 9.7

Step-by-step explanation:

3 0
2 years ago
5 + u = 12<br> what’s the answer?
Ksju [112]

Answer:

the answer is 7

Step-by-step explanation:

12-5=7 and seven equals u

5 0
2 years ago
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thomas constructed two parallel lines, p and q, and a transversal as shown in the diagram below. now, thomas wants to reconstruc
dolphi86 [110]

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draw a line from point A to point R, i just got the answer

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3 years ago
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