2 years ago

Find the value of x in the proportion. Check your answer.

Mathematics

1 answer:

AleksAgata [21]2 years ago

7 0

Answer:

Step-by-step explanation:

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Two square rooms have a total floor of 89m^2.one room is 3m longer each way than the other,find the dimensions of the rooms

Katen [24]

Thank you for posting your question here at brainly. Below is the solution. I hope the answer will help you.

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5) x ( x+6) = 135

x^2 +6x -135 = 0 

( x-9) ( x+15) = 0 

x = 9 

ANSWER 9 & 15

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2 years ago

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Answer:

1/3

Step-by-step explanation:

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3 years ago

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ValentinkaMS [17]

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2 years ago

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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3 years ago

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Ulleksa [173]

Answer:

$multiplication \: by \: its \: self = > power \\ multiplication = > product \\ addition = > sum \\ division = > quotient \\ substraction = > difference \\ thank \: yo$

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