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Kay [80]
3 years ago
10

Apply the distributive property to factor out the greatest common factor of all three terms. 14x + 21y + 7z =

Mathematics
2 answers:
iren [92.7K]3 years ago
8 0
I think 7 would be the greatest common factor as they all have different variables. By factoring out 7 you should end up with, 2x+3y+z=

Savatey [412]3 years ago
5 0
You add it all together and devide by three


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The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the
Feliz [49]

Answer:

a) σ  =  4933,64

b) CI 99%  = ( - 5746  ;  7194 )

c) No difference in brands

Step-by-step explanation:

Brand 1:

n₁   =  8

x₁   = 38222

s₁   = 4974

Brand 2:

n₂  = 8

x₂  = 37498

s₂  = 4893

As n₁  =  n₂  = 8       Small sample  we work with t -student table

degree of freedom      df  = n₁  +  n₂  - 2    df = 8 +8 -2  df = 14

CI = 99 %   CI  =  0,99

From  t-student table we find   t(c)  = 2,624

CI  =   (  x₁  -  x₂ ) ±  t(c) * √σ²/n₁   +  σ²/n₂

σ² = [( n₁  -  1 ) *s₁² +  ( n₂  -  1  ) * s₂² ] / n₁ +n₂ -2

σ² = 7* (4974)² + 7*( 4893)² / 14

σ² = 24340783       σ  =  4933,64

√ σ²/n₁  +  σ²/n₂     =  √ 24340783/8   +  24340783/8

√ σ²/n₁  +  σ²/n₂     =  2466

CI 99%  =  (  x₁  -  x₂ ) ± 2,624* 2466

CI 99%  =   724  ± 6470

CI 99%  = ( - 5746  ;  7194 )

As we can see CI 99% contains 0 and that means that there is not statistical difference between mean life of the two groups

3 0
3 years ago
A holiday meal cost 12.50 a person plus a delivery fee of $30 at we cater. The same meal cost $15 a person with no fee at Good E
4vir4ik [10]

Given :

A holiday meal cost 12.50 a person plus a delivery fee of $30 at we cater.

The same meal cost $15 a person with no fee at Good Eats.

To Find :

When does we cater become the better deal.

Solution :

Let , x is number of order .

Cost at cater , C = 12.5x + 30 .

Cost at Good Eats , G = 15x .

We need to find :

G > C

15x>12.5x + 30\\\\2.5x>30\\\\x>12

Therefore, after 12th order cater will be more value for money.

Hence, this is the required solution.

3 0
4 years ago
For what values of theta(0
Art [367]

Answer:

pi/2

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Arnold is studying data and statistics in math class. His teacher has assigned a project, where the students must develop a rese
Trava [24]

Answer:

one sec i will answer this

Step-by-step explanation:

4 0
3 years ago
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What is the ratio of 8 quarters to 45 nickels?
Taya2010 [7]

The ratio would be 8:45

6 0
3 years ago
Read 2 more answers
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