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Aleks04 [339]
4 years ago
12

Timed please i will pick brainliest

Mathematics
2 answers:
iragen [17]4 years ago
6 0

let

x---------> Aviva’s age

y--------->Kanti’s age

z--------> Lakshmi’s age


we know that


y=x-3-----> equation 1

z=2*y-----> equation 2

substitute equation 1 in equation 2

z=2*(x-3)

so

Aviva’s age------> x

Kanti’s age-------> x-3

Lakshmi’s age----> 2*(x-3)


therefore


the answer is the option

b) 2(x-3)

mr Goodwill [35]4 years ago
3 0

Answer:

B: 2(x-3)

Step-by-step explanation:

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X= 82°

Step-by-step explanation:

Since we know ∠DAB is 41°, we also know that ∠CBA is 41°, since they must be equal.  This tells us that the bottom angle of that triangle must be 98°, since the sum of all interior angles must equal 180°.  Since this angle is supplementary to x, we know that x must equal 82°.

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Answer:

Hello here is the missing data to your question

x  P(x)

0  0.167

1  0.3289

2  0.2801

3  0.149

4  0.0382

5  0.0368

The theoretical values are lower than the approximate values and the property illustrated is the mean and standard deviation

A) 1.6729

B)  1.234061

C) 1.84

D)  1.462874

Step-by-step explanation:

A) calculate the theoretical mean

theoretical mean (u) = summation of ; x_{i}p(x_{i})

                 = 0(0.167)+1(0.3289)+2(0.2801)+3(0.149)+4(0.0382)+5(0.0369)

                 = 1.6729

B) calculate the theoretical standard deviation

     theoretical standard deviation = \sqrt{variance} = \sqrt{[summation of x_{i}^2 p(x_{i} ) ]-u^2}

= \sqrt{[0+0.3289+1.1204+1.341+0.6112+0.92]-(2.798594)}

= 1.234061

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the generated data used for calculation is added below

mean (x) = \frac{summation of (x_{i}) }{n} = \frac{1+2...+2+1}{25} = 46/25 = 1.84

D) calculate the approximate standard deviation

std = \sqrt{variance}

     = \sqrt{\frac{summation of( x_{i}-x )^2}{n-1} }

    = \sqrt{2.14} = 1.462874

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