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vodomira [7]
3 years ago
7

3x-2 (4x-9) = 4 - 27 - x

Mathematics
1 answer:
pentagon [3]3 years ago
7 0
I got the answer 10.25. Hope this could help. Including my work incase you were required to show work or something :)
3x-2(4x-9)=4-27-x
3x-8x+18=4-27-x
-5x+18=4-27-x
-5x+28=-23-x
-5x+41=-x
41=4x
41/4=10.25
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2 years ago
What is 3.727? Plz help ASAP plz
Galina-37 [17]

Answer:

3 727/1000

Step-by-step explanation:

First, the ones place is 3, so we already know that

Also, there is a 0.727.

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4 0
3 years ago
Read 2 more answers
$500, 3.75, 4 months
mario62 [17]

Answer:

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6 0
3 years ago
An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had
Stolb23 [73]

Answer:

Q1 z(s) is in the rejection region for H₀ ; we reject H₀. We can´t support the that means have no difference

Q2  CI 95 %  =  (  0,056 ;  0,164 )

Step-by-step explanation:

Sample information for people under 18

n₁  =  500

x₁ =  180

p₁  =  180/ 500    p₁  =  0,36    then  q₁  =  1 -  p₁     q₁ =  0,64

Sample information for people over 18

n₂  =  600

x₂  =  150

p₂  =  150 / 600   p₂ =  0,25   then   q₂  =  1 - p₂   q₂ =  1 - 0,25   q₂ = 0,75

Hypothesis Test

Null hypothesis                        H₀              p₁  =  p₂

Alternative Hypothesis           Hₐ              p₁  ≠  p₂

The alternative hypothesis indicates that the test is a two-tail test.

We will use the approximation to normal distribution of the binomial distribution according to the sizes of both samples.

Testin at CI =  95 %    significance level is  α = 5 %   α  =  0,05  and

α/ 2  =  0,025   z (c) for that α  is from z-table:

z(c) = 1,96

To calculate   z(s)

z(s)  =  ( p₁  -   p₂ ) / EED

EED = √(p₁*q₁)n₁  +  (p₂*q₂)/n₂

EED = √( 0,36*0.64)/500  +  (0,25*0,75)/600

EED = √0,00046  +  0,0003125

EED = 0,028

( p₁  -  p₂  )  =  0,36  -  0,25  = 0,11

Then

z(s)  =  0,11 / 0,028

z(s) = 3,93

Comparing  z(s) and  z (c)    z(s) > z(c)

z(s) is in the rejection region for H₀ ; we reject H₀. We can´t support the idea of equals means

Q2  CI  95 %   =  (  p₁  -  p₂  ) ±  z(c) * EED

CI 95%  =  ( 0,11   ±  1,96 * 0,028 )

CI 95%  = (  0,11  ±  0,054 )

CI 95 %  =  (  0,056 ;  0,164 )

8 0
2 years ago
What is the domain of this relation? (14, 2) (5, 17) (-1, 8) (9, 3)?
koban [17]
Domain is the collection of the x values: {14, 5, -1, 9}
5 0
3 years ago
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