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2 years ago

Find the value of y please!

Mathematics

1 answer:

Tems11 [23]2 years ago

7 0

Answer:

Y=4

Step-by-step explanation:

Because the two triangles are congruent you can set the two expressions equal to each other and solve from their.

step 1 ) 8Y = 6Y + 8

step 2 ) isolate the variable to one side 8Y-6Y= 8 => 2Y = 8

step 3 ) solve for Y 2Y/2 = 8/2

Solution Y=4

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Step-by-step explanation:

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3 years ago

12.4. Measure of Dispersion 2076 Q.No. 15 Find the standard deviation of: 4, 6, 8, 10, 12.

Alenkinab [10]

Answer:

Standard deviation of given data = 3.16227

Step-by-step explanation:

Step(i):-

Given sample size 'n' = 5

Given data 4, 6,8,10,12

$Mean = \frac{4+6+8+10+12}{5} = 8$

Mean of the sample x⁻ = 8

Standard deviation of the sample

$S.D = \sqrt{\frac{Sum(x-x^{-} )^{2} }{n-1}}$

Step(ii):-

Given data

x : 4 6 8 10 12

x-x⁻ : 4 - 8 6-8 8-8 10-8 12-8

(x-x⁻) : -4 -2 0 2 4

(x-x⁻)² : 16 4 0 4 16

$S.D = \sqrt{\frac{Sum(x-x^{-} )^{2} }{n-1}}$

$S.D = \sqrt{\frac{16+4+0+4+16}{4}}$

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Final answer:-

The standard deviation = 3.16227

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