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Olenka [21]
3 years ago
12

Help me please ASAP ......

Mathematics
1 answer:
Dvinal [7]3 years ago
5 0
4. 3(y + 4y) this is distributive property!  Hope it helps. Btw can you please check out a question on my page? thanks!! <span />
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The length of a phone conversation is normally distributed with a mean of 4 minutes and a standard deviation of .6 minutes. What
Ivanshal [37]

Answer:

0.04746

Step-by-step explanation:

To answer this one needs to find the area under the standard normal curve to the left of 5 minutes when the mean is 4 minutes and the std. dev. is 0.6 minutes.  Either use a table of z-scores or a calculator with probability distribution functions.

In this case I will use my old Texas Instruments TI-83 calculator.  I select the normalcdf( function and type in the following arguments:  :

normalcdf(-100, 5, 4, 0.6).  The result is 0.952.  This is the area under the curve to the left of x = 5.  But we are interested in finding the probability that a conversation lasts longer than 5 minutes.  To find this, subtract 0.952 from 1.000:   0.048.  This is the area under the curve to the RIGHT of x = 5.

This 0.048 is closest to the first answer choice:  0.04746.

8 0
3 years ago
On a coordinate plane, what are the center and radius of the circle represented by
DIA [1.3K]

The answer is D.

Center is (-3, 5) and Radium is 5

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2 years ago
IT TUVW is reflected across the line y = .x, what are the coordinates of V'?
Kay [80]

Answer:

Its A

Step-by-step explanation:

3 0
2 years ago
What are the dimensions of the following matrix [5 3]?
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The answer is none of these
7 0
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Julio spends about 1/2 hour reading every night he owns 8 science fiction books 12 mystery books and 7 history he wants to add e
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8+7+12=27
40-27=13
So he needs 13 more books
8 0
3 years ago
Read 2 more answers
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