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Papessa [141]
3 years ago
13

What is the estimate of 256+321

Mathematics
2 answers:
Sati [7]3 years ago
6 0
The estimate would be 2+3 5+2 and 6+1 so 577 you can also just round and do 250 +300= 550 +20=570
grandymaker [24]3 years ago
5 0
The estimate of 256+321 is
600 if your going by hundredths place
580 if your going by tenths place
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Answer: range= 26, variance= 80 and standard deviation= 8.94

Step-by-step explanation:

Range = highest - lowest

Range = 146 - 120

Range= 26

Let m be mean

M=mean=sum/n

Mean=(120+134+146+127+138+133) / 6

M=798/6

M=133

The standard deviation sample formula:

S.D = sqrt( Summation of |x-m|^2 / n-1)

Let start finding:

|x-m|^2

For 1st: |120-133|^2=169

For 2nd: |134-133|^2=1

For 3rd: |146-133|^2=169

For 4th: |127-133|^2=36

For 5th: |138-133|^2=25

For 6th: |133-133|^2=0

Summation of |x-m|^2 = 400

The standard deviation formula is :

S.D = sqrt( Summation of |x-m|^2 / n-1)

S.D= sqrt(400 / 5)

S.D=sqrt(80)

S.D= 8.94

Variance = (Summation of |x-m|^2 / n-1)

Variance= 400/5

Variance= 80

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Answer:

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Step-by-step explanation:

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soldier1979 [14.2K]

Answer:

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Answer:

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erastovalidia [21]

Answer:

x=120, y=160. and is that u in ur pfp

Step-by-step explanation:

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