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marshall27 [118]
3 years ago
7

Help plzzz real quick on this

Mathematics
2 answers:
AysviL [449]3 years ago
7 0
The parallel lines have the same slope. So we should check the slope from all the options. We will use formula
m = (y₂ - y₁) / (x₂ - x₁)

First Option
(x₁,y₁) = (-8,8)
(x₂,y₂) = (2,2)
Find the slope (m)
m = (y₂ - y₁) / (x₂ - x₁)
m = (2 - 8)/(2 + 8)
m = -6/10
m = -3/5
It has the same slope of -3/5, so it's parallel with the line.

Second Option
(x₁,y₁) = (-5,-1)
(x₂,y₂) = (0,2)
Find the slope (m)
m = (y₂ - y₁) / (x₂ - x₁)
m = (2 + 1) / (0 + 5)
m = 3/5
It doesn't have the same slope, so it's not parallel with the line.

Third Option
(x₁,y₁) = (-3,6)
(x₂,y₂) = (6,-9)
Find the slope (m)
m = (y₂ - y₁) / (x₂ - x₁)
m = (-9 - 6) / (6 + 3)
m = -15/9
m = -5/3
It doesn't have the same slope, so it's not parallel with the line

Fourth Option
(x₁,y₁) = (-2,1)
(x₂,y₂) = (3,-2)
Find the slope (m)
m = (y₂ - y₁) / (x₂ - x₁)
m = (-2 - 1) / (3 + 2)
m = -3/5
It has the same slope of -3/5, so it's parallel with the line.

Fifth Option
(x₁,y₁) = (0,2)
(x₂,y₂) = (5,5)
Find the slope (m)
m = (y₂ - y₁) / (x₂ - x₁)
m = (5 - 2) / (5 - 0)
m = 3/5
It doesn't have the same slope, so it's not parallel with the line.

SUMMARY
The parallel lines are first option and fourth option
Darina [25.2K]3 years ago
3 0
1 and 4. Please give brainliest!
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given data

distribution = 4.5, 6.4, 2.3, 1.8, 5.3

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confidence interval = 95%

to find out

the population mean is between

solution

first we calculate the mean i.e.

mean =  \frac{1}{n}\sum_{i=1}^{n}x(i)

mean =  4.5+ 6.4+ 2.3+ 1.8+ 5.3 / 5

mean = 4.06

now we calculate the standard deviation i.e.

standard deviation =   \sqrt{\frac{1}{n-1}\sum (x(i)-mean)^2}

standard deviation =   \sqrt{\frac{1}{5-1}\sum (x(i)-mean)^2}

standard deviation =   \sqrt{\frac{1}{5-1} (4.5-5)^2+(6.4-5)^2 +(2.3-5)^2+(1.8-5)^2+(5.3-5)^2}

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standard deviation =  2.226544

so 95 % confidence interval is i.e. mean +/- t(5) * standard deviation/ \sqrt{n}

here t(5) will be 2.45

so

95 % confidence interval=  4.06 +/- 2.45 * 2.226 / \sqrt{5}

95 % confidence interval= 1.62 and 6.50

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