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Strike441 [17]
3 years ago
7

What is b-1 over b-1

Mathematics
1 answer:
diamong [38]3 years ago
8 0

Answer:

what?Can you write better?

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The mean number of words per minute (WPM) typed by a speed typist is 149149 with a standard deviation of 1414 WPM. What is the p
Semmy [17]

Answer:

The probability is  P(\=  X  >  x ) = 0.78814

Step-by-step explanation:

From the question we are given that

     The population  mean is  \mu  =  149

     The standard deviation is  \sigma  =  14

     The random number    x  =  147.81

      The sample  size is  n  = 88

The probability that  the sample mean would be greater than P(\=  X  >  x ) =  P( \frac{ \= x   -  \mu   }{\sigma_{\= x} }  > \frac{ x - \mu  }{\sigma_{\= x} }  )

Generally the z- score of this normal distribution is mathematically represented as

       Z  =  \frac{ \=  x   -  \mu  }{\sigma_{\= x} }

Now

        \sigma_{\= x } =  \frac{\sigma }{\sqrt{n} }

substituting values

         \sigma_{\= x } =  \frac{14 }{\sqrt{88} }

         \sigma_{\= x } =  1.492

Which implies that

         P(\=  X  >  x ) =  P( Z  > \frac{ 147.81  - 149   }{ 1.492}  )

        P(\=  X  >  x ) =  P( Z  > -0.80  )

Now from the z-table  the  probability is  found to be

        P(\=  X  >  x ) = 0.78814

5 0
3 years ago
Pls pls help! 50pts!!!
Alchen [17]

Answer:

I figured all these out by graphing the function. See the attachment for a picture.

h(x) = (x-1)^2

It's <u>increasing over (1, ∞)</u> because the values are going up in that span.

It's <u>decreasing over (-∞, 1)</u> because the values are going down in that span.

Its range is all values of <u>y </u>\geq<u> 0</u> (we can see that only y-values above 0 are in the function).

g(x) = -(x+1)(x-1)

It's <u>increasing over (-∞, 0)</u> because the values are going up in that span.

It's <u>decreasing over (0, ∞)</u> because the values are going down in that span.

Its range is all values of <u>y </u>\leq<u> -1</u> (we can see that only y-values below 1 are in the function).

5 0
3 years ago
Read 2 more answers
Find the quotient of 1 2/3 and 6
chubhunter [2.5K]
If you're asking 1.67/6 the answer is 0.276 which rounds to 0.28
3 0
3 years ago
Find the area of the triangle.
Lunna [17]

Answer:

27

Step-by-step explanation:

I added 6 and 3 and got 9 for the base.

Then I multiplied 9 to 4, and got 54.

Then, I divided 54 and 2.

The Final Answer is 27.

(Hope this helps and it's not wrong...)

8 0
3 years ago
Read 2 more answers
Which table contains only corresponding x - values and y - values where the value of y is 3 more than the quotient of x and 2?
melisa1 [442]

Fr like whats the answer choice

6 0
3 years ago
Read 2 more answers
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