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3 years ago

Which situation can be represented by the equation 100-2 x=140-6?

Mathematics

2 answers:

Sergio039 [100]3 years ago

4 0

Answer:

Linear

Step-by-step explanation:

kondor19780726 [428]3 years ago

4 0

Answer:

Let's solve your equation step-by-step.

100−2x=140−6

Answer:

x=−17

Step-by-step explanation:

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Multiple choice, picture attached :)

timofeeve [1]

Answer:

Step-by-step explanation:

A constant rate per week is b = 1.00

1.06 - 1.00 = 0.06

Move the decimal over 2 places to get 6% which is the share's value

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3 years ago

PLEASE HELP IM CONFUSED... Which statement about the figure above is true?

prisoha [69]

Answer:

it would make most sense as the second answer or the one with the yellow dot next to it

Step-by-step explanation:

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2 years ago

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lilavasa [31]

Answer:

11.70

Step-by-step explanation:

d=√((16-5)^2+(14-10)^2)=11.7046999...

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2 years ago

Assume that the helium porosity of coal samples taken from any particular seam is Normally distributed with true standard deviat

riadik2000 [5.3K]

Answer:

a) $4.85-2.33\frac{0.75}{\sqrt{20}}=4.46$

$4.85+2.33\frac{0.75}{\sqrt{20}}=5.24$

b) $4.56-2.33\frac{0.75}{\sqrt{16}}=4.12$

$4.56+2.33\frac{0.75}{\sqrt{16}}=4.99$

c) $n=(\frac{1.960(0.75)}{0.2})^2 =54.02 \approx 55$

Step-by-step explanation:

Part a

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The Confidence is 0.98 or 98%, the value of $\alpha=0.02$ and $\alpha/2 =0.01$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.01,0,1)".And we see that $z_{\alpha/2}=2.33$

Now we have everything in order to replace into formula (1):

$4.85-2.33\frac{0.75}{\sqrt{20}}=4.46$

$4.85+2.33\frac{0.75}{\sqrt{20}}=5.24$

Part b

$4.56-2.33\frac{0.75}{\sqrt{16}}=4.12$

$4.56+2.33\frac{0.75}{\sqrt{16}}=4.99$

Part c

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =0.4/2 =0.2 we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got $z_{\alpha/2}=1.960$ , replacing into formula (b) we got:

$n=(\frac{1.960(0.75)}{0.2})^2 =54.02 \approx 55$

5 0

3 years ago

The diameter of a dime is seven hundred five thousands of an inch

andreyandreev [35.5K]

Thats a fact but what is your question

6 0

2 years ago