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stellarik [79]
3 years ago
13

Will mark right answer brainliest!

Mathematics
1 answer:
Georgia [21]3 years ago
5 0

Answer:

1/12

Step-by-step explanation:

3/4 + -2/3

Get a common denominator of 12

3/4 *3/3 - 2/3 *4/4

9/12 - 8/12

1/12

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A contractor records all of the bedroom areas, in square feet, of a five-bedroom house as: 100, 100, 120, 120, 180 What is the v
kifflom [539]
The variance is the total of the squared distances of the given data from the mean. 

This can be calculated through the equation,
        
                            σ² = summation of X² / N  - μ²

where σ² is the variance X's are the data, N is the number of terms, and μ is the mean.

   summation of X² = 100² + 100² + 120² + 120² + 180² = 81200
                          N = 5
                                        μ = (100 + 100 + 120 + 120 + 180) / 5
                                         μ = 124

Substituting these values to the equation for variance,
                                 
                              σ² = (81200/5) - 124² = 864

Thus, the variance is equal to 864. 
4 0
3 years ago
Read 2 more answers
How many solutions can be found for the linear equation? 3(x+4)=3x+4
Hitman42 [59]
Hi there! The answer is 0 solutions.

3(x + 4) = 3x + 4
First we need to work out the parenthesis (for instance possible by using rainbow technique).

3x + 12 = 3x + 4
Now subtract 12.

3x = 3x  - 8
Now we can see that the right side of the equation is always 8 smaller than the left side of the equation. Because the right is always smaller, this equation cannot be solved. Therefore there are no solutions to this equation. The answer is 0 solutions.

3 0
3 years ago
! et up your proportions) Eduardo counted eight seconds between seeing lightning and hearing thunder, and he knew that the light
vova2212 [387]

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1 mile away this is right

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astraxan [27]

Answer:

51.84sq

Step-by-step explanation:

4 0
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70% of the world's snake species lay eggs, while the remaining ones give birth to live young. If there are 2,700 different speci
igomit [66]
If 70% lay eggs, that leaves the remaining 30% to give live birth. 2700(0.30) = 810 species
8 0
3 years ago
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