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3 years ago

How do I plot these on the number line?? Answers quick!

Mathematics

1 answer:

maw [93]3 years ago

3 0

Convert them into fractions
i)-2 3/8 = -19/8
ii)0.75 = 75/100 = 3/4
iv) 1 3/4 = 7/4
Now convert all of them in the form of p/q where q = 8
Therefore
ii)6/8
iv) 14/8

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From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.

zzz [600]

Answer: (20.86, 22.52)

Step-by-step explanation:

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where $\overline{x}$ = sample mean.

z*= critical z-value

n= sample size.

$\sigma$ = Population standard deviation.

By considering the given question , we have

$\overline{x}= 21.69$

$\sigma=3.23$

n= 58

Using z-table, the critical z-value for 95% confidence = z* = 1.96

Then, 95% confidence interval for the amount of time spent on administrative issues will be :

$21.69\pm (1.96)\dfrac{3.23}{\sqrt{58}}$

$=21.69\pm (1.96)\dfrac{1.7}{7.61577}$

$=21.69\pm (1.96)(0.223221)$

$\approx21.69\pm0.83$

$=(21.69-0.83,\ 21.69+0.83)=(20.86,\ 22.52)$

Hence, the 95% confidence interval for the amount of time spent on administrative issues = (20.86, 22.52)

7 0

3 years ago

What is 39% of 200?<br> i already know it’s 78, i just need a explanation of how i got it.

spayn [35]

Answer:

200 x .39

Step-by-step explanation:

200 x .39= 78

6 0

3 years ago

Read 2 more answers

ANSWER ASAP MUST BE CORRECT

Galina-37 [17]

Solve the second equation for y so that you can substitute it in for y in the first equation..

y = 5x - 4

Substitute:

3x + (5x - 4) = 1

3 0

3 years ago

Read 2 more answers

I need help with number 13

nikklg [1K]

The slope-intercept form:

$y=mx+b$

m - slope

b - y-intercept → (0, b)

We have the point (0, 5). Therefore b = 5.

We have: y = mx + 5

Other point (3, 2). Substitute the coordinates of the point to the equation of the line:

$2=3m+5$ <em>subtract 5 from both sides</em>

$-3=3m$ <em>divide both sides by 3</em>

$-1=m\to m=-1$

<h3>Answer: f(x) = -1x + 5 = -x + 5</h3>

3 0

3 years ago

Use the image to determine the value of “X”

PtichkaEL [24]

C. X= 18

ex:
4x-7=7x-61
(They equal eachother)
you solve and get 18

4 0

3 years ago