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seraphim [82]
3 years ago
14

What’s 20-20? I’ll give brainliest who is the 1st to answer.

Mathematics
2 answers:
iris [78.8K]3 years ago
8 0
0





anaksnkskansjckcnalapnf
nignag [31]3 years ago
8 0

Answer:

20 - 20 =0 me trying to get the points lol edit : oh well I couldn't get the points:( lol

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Keeping the properties of exponents in mind, to what power must you raise the expression 7 1/2 to get 7 as a result
zhenek [66]
For this case we have the following expression:
 7 ^ {(1/2)}

 Rewriting the expression we have:
 (7 ^ {(1/2)}) ^ x

 Where,
 x: exponent to which we must raise the expression to obtain 7 as a result.
 We have then:
 7 ^ {((1/2) x)}

 The exponent must be equal to 1:
 (1/2) x = 1

 Clearing x we have: 
 x = 2

 Substituting valres:
 7 ^ {((1/2) 2)}

7 ^ 1

7
 Answer:
 
you must raise the expression to 2
7 0
4 years ago
The per capita electric power consumption level in a recent year in Ecuador is normally distributed, with a mean of 471.5 kilo-w
Olin [163]

Answer:

a) 471.5 kilo-watt hours.

b) 31.76 kilo-watt hours

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the population:

Mean 471.5 kilo-watt hours.

Standard deviation of 187.9 kilowatt-hours.

For the sample:

Sample size of 35, by the Central Limit Theorem:

a) Mean

471.5 kilo-watt hours.

b) Standard deviation

s = \frac{187.9}{\sqrt{35}} = 31.76

31.76 kilo-watt hours

7 0
3 years ago
Find domain and range
igor_vitrenko [27]

Answer:

Step-by-step explanation:

Here the domain consists of all the unique input values:  {7, 9, 6, 11}, and the rane of all  output values:  {6.4, 12.8, 23.5}

8 0
2 years ago
Read 2 more answers
Y is between points p and b. pt= 15 and tb = 10. what is pb
Kruka [31]
PT = 15, and TB = 10 

Take the 15 from PT, and add the 10 from TB. Which equals 25. 

PB = 25 

So, 25 is your answer. 

Hope this helps! ☺
4 0
3 years ago
there were twenty one adults in line at a movie theater.That is three times the number of children in line. how many children we
V125BC [204]
You would do 21 divided by 3 and get 7.

The answer is 7 kids are in the line.




Please vote my answer the brainiest if it was helpful!!








7 0
3 years ago
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