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vaieri [72.5K]
2 years ago
15

I’ll mark you brainlist I’ll mark you brainlist show work

Mathematics
1 answer:
Alex787 [66]2 years ago
5 0

Answer:

2=p

Step-by-step explanation:

-5p+7=5p-13

+5p +5p

7=10p-13

+13 +13

20=10p

÷10 ÷10

2=p

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Mike earned $150 by selling 75 boxes of cookies to his neighbors using the same rate for the cost of one box of cookies how many
stich3 [128]

Answer:

to earn what

Step-by-step explanation:

7 0
2 years ago
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The Statistical Abstract of the United States published by the U.S. Census Bureau reports that the average annual consumption of
Karo-lina-s [1.5K]

Answer:

a) P(\bar X

b)P(98

c) P(\bar X

d) P(93

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part a

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(99.9,30)  

Where \mu=99.9 and \sigma=30

We select a random sample of n=36. And from the central limit theorem we know that the distribution for the sample is given by:

\bar X \sim N(\mu =99.9 , \frac{\sigma}{\sqrt{n}}= \frac{30}{\sqrt{38}}=4.87)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X

=P(Z

Part b

For this case we want this probability:

P(98

=P(\frac{98-99.9}{\frac{30}{\sqrt{38}}}

And we can find this probability on this way:

P(-0.39

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-0.39

Part c

If we apply this formula to our probability we got this:

P(\bar X

P(\bar X

Part d

For this case we want this probability:

P(93

=P(\frac{93-99.9}{\frac{30}{\sqrt{38}}}

And we can find this probability on this way:

P(-1.42

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-1.42

3 0
3 years ago
Wyatt is enlarging a rectangular drawing using a scale factor of 2.5.<br> 7.4 in<br> 5 in
omeli [17]
It is 2.4 x 2.5 which equals 6 the answer is 6
3 0
3 years ago
Please help me! I need this answered fast!
zysi [14]

Answer:

Number 5 is D

Number 6 is A

3 0
3 years ago
The value of the x-intercept for the graph of 4x-5y=40 is<br> 1) 10<br> 2) 4/5<br> 3) -4/5<br> 4) -8
borishaifa [10]

Answer:

I took it and got this question anf got it correct! Hope i helped!

Step-by-step explanation:

- 8

7 0
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