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katrin [286]
2 years ago
6

Find the mean of the following numbers; 7 21 2 17 3 14 7 4 9 7 9

Mathematics
2 answers:
adell [148]2 years ago
8 0
<h2>mean = 9.09</h2><h2>_________________</h2>

Step-by-step explanation:

mean = sum ÷ numbers

= 100 ÷ 11

= 9.09

<h2>_________________</h2><h2>FOLLOW ME</h2>
Margarita [4]2 years ago
3 0

Answer:

9

Step-by-step explanation:

2,3,4,7,7,7,9,9,14,17,21

21,17,14,9,9,7,7,7,4,3,2

3,7,7,7,9,9,17,21

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PLS!
Mars2501 [29]

Answer:

Enterprise charges more for a 6 day rental.  ($284 for Hertz and $294 for Enterprise). Avery would save $4 if he rented with Hertz for 4 days.

Step-by-step explanation:

H = Hertz

E = Enterprise

x = Days rented

T = Total cost for x days, in $

<u>Hertz:</u>   TH = 42x + 32

<u>Enterprise: </u> TE= 45x + 24

====================

6 Day Rental:

TH = 42*(6) + 32,    =  $284

TE  = 45*(6) + 24     =  $294

4 Day Rental:

TH = 42*(4) + 32,    =  $200

TE  = 45*(4) + 24     =  $204

<u></u>

<u></u>

4 0
2 years ago
A rectangle is 3 times as long as it is wide, and its perimeter is 80 centimeters. Find its dimensions
Free_Kalibri [48]

Say the width is W and the length is L

L=3W (and of course W=W)

Now you use the perimeter formula P=2L+2W

80=2(3W) + 2W)

80=6W+2W

80=8W Divide both sides by 8

W=10

Now that you know the width, substitute it back into L=3W to find the length

L=3(10)

L=30

The dimensions are length: 30 cm and width: 10 cm

8 0
3 years ago
Please help! Ill mark brainliest if correct! help ASAP
amm1812

Answer:

Its 1,020

Hope u get it right!!!

U got this!!!!!!!!!!

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
HELP PLS i’ll mark as brainliest if correct
Vlada [557]

Answer:

I believe the answer is the second one

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A test is used to assess readiness for college. In a recent​ year, the mean test score was 20.3 and the standard deviation was 4
Vlada [557]

Answer:

\mu = 20.3

\sigma = 4.9

And we can find the limits in order to consider values as significantly low and high like this:

Low\leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5

High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

Solution to the problem

For this case we can consider a value to be significantly low if we have that the z  score is lower or equal to - 2 and we can consider a value to be significantly high if its z score is  higher tor equal to 2.

For this case we have the mean and the deviation given:

\mu = 20.3

\sigma = 4.9

And we can find the limits in order to consider values as significantly low and high like this:

Low \leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5

High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1

6 0
3 years ago
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