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3 years ago

Evaluate the expression (10 + 4) x 7 - 45 dividend by 9

Mathematics

1 answer:

Ludmilka [50]3 years ago

4 0

5.8 should be the answer

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Which set of ordered pairs represents y as a function of X?

Kobotan [32]

Answer:

Step-by-step explanation:

A. Here is why:

In a function, each x maps to exactly one value of y.

In B and C, x = -3 maps to both -1 and 2, is they are not functions.

4 0

3 years ago

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

Find the domain and range of the relation.

andre [41]

X|59|46|24|24
Y|48|38|38|26

Domain:{24; 46; 59}
Range:{26; 38; 48}

Answer: C.

8 0

3 years ago

What is answer to this equation 7x-4=2

Inga [223]

7x=2+4
7x=6
X=6/7 ans
Hope you like it

3 0

3 years ago

Read 2 more answers

PLEEEEASE HELP ME!!

mixer [17]

Answer:

umm km / nk

Step-by-step explanation:

I DONT know if this is right...…can u plz mark me brainiest? I really need it!!!!

7 0

3 years ago

Read 2 more answers