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3 years ago

Please help me with the last question please

Mathematics

1 answer:

choli [55]3 years ago

6 0

The answer is 12/4 because the ratio is 4/5 and we would multiply 4 to which is 12

Is this helped please award me brainliest because I only need one more for the next rank

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I need help with only question 7!!!

uysha [10]

Answer:

I think it's 16

Step-by-step explanation:

i just kinda figured out the pattern

4 0

3 years ago

Simplify the following expression to an answer with only positive exponents.

yulyashka [42]

Answer:

The correct answer is (edit: b).

Step-by-step explanation:

$\frac{(2x^5y^7)(-5x^4z^{-5})}{y^{12}z^6}\\\\\frac{-10x^9y^7z^{-5}}{y^{12}z^6}\\\\\frac{-10x^9}{y^5z^{11}}$

3 0

3 years ago

A distance AB is observed repeatedly using the same equipment and procedures, and the results, in meters, are listed below: 67.4

skad [1K]

Answer:

a) $\bar X =\frac{67.401+67.400+67.402+67.396+67.406+67.401+67.396+67.401+67.405+67.404}{10}=67.401$

b) The sample deviation is calculated from the following formula:

$s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And for this case after replace the values and with the sample mean already calculated we got:

$s=0.0036$

If we assume that the data represent a population then the standard deviation would be given by:

$\sigma=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And then the deviation would be:

$\sigma =0.00319$

Step-by-step explanation:

For this case we have the following dataset:

67.401, 67.400, 67.402, 67.396, 67.406, 67.401, 67.396, 67.401, 67.405, and 67.404

Part a: Determine the most probable value.

For this case the most probably value would be the sample mean given by this formula:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}$

And if we replace we got:

$\bar X =\frac{67.401+67.400+67.402+67.396+67.406+67.401+67.396+67.401+67.405+67.404}{10}=67.401$

Part b: Determine the standard deviation

The sample deviation is calculated from the following formula:

$s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And for this case after replace the values and with the sample mean already calculated we got:

$s=0.0036$

If we assume that the data represent a population then the standard deviation would be given by:

$\sigma=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And then the deviation would be:

$\sigma =0.00319$

3 0

4 years ago

Help!!<br> What is the number to make -27 I need help please

vladimir1956 [14]

Answer:

-15

Step-by-step explanation:

9/5=1.8

-27 divided by 1.8 equals -15

and to check you can do -15×9/5

and that gives you -27

8 0

4 years ago

Someone please help i am so confused

natka813 [3]

Use the formula a^2 + b^2 = c^2
so you’re set up would be 4^2 + 12 1/3^2 = c^2

6 0

3 years ago