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3 years ago

Plz, answer. Will mark brainiest. Please! 50 points!!!

Mathematics

2 answers:

igor_vitrenko [27]3 years ago

8 0

Answer:

12%

Step-by-step explanation:

Rzqust [24]3 years ago

5 0

Answer:

12%

(12ish at least, I don't know if this problem requires the exact decimal.)

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What is the slope of the line that passes through (-12, -5) and (0, -8)?

Lady bird [3.3K]

Answer:

-3/12

Step-by-step explanation:

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3 years ago

Select all the inrational numbers from the list

snow_tiger [21]

B is one.

A < C and D are rational

Im thinking about E. It looks like a recurring decimal at first sight but I think its irrational.

8 0

3 years ago

Read 2 more answers

A marketing researcher wants to find a 96% confidence interval for the mean amount those visitors spend per person per day while

ki77a [65]

Answer:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=12$ represent the population standard deviation

n represent the sample size

ME = 4 the margin of error desired

Solution to the problem

When we create a confidence interval for the mean 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 =4 and 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 96% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=1-0.96 =0.04$ . And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got $z_{\alpha/2}=2.054$ , replacing into formula (b) we got:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

5 0

3 years ago

BER33333 Solving a word problem with two unknowns using a linear...

garri49 [273]

Answer:

Step-by-step explanation:

x+x+8=104

2x=96

x=48

48+8=56

7 0

2 years ago

The function is f(x) = -5x + 2. <br><br> How would the function change if f(x) + 3?

suter [353]

Answer:

f(3) = -13

Step-by-step explanation:

To answer this question, we plug 3 into the place of x, so the equation now looks like;

f(3) = -5(3) + 2

We simply apply PEMDAS by multiplying -5 and 3, then adding 2 to get;

f(3) = -13

Hope this helps!

-Lacy

3 0

3 years ago