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3 years ago

÷×(+) =30 how do u fill in the blank for this problem

Mathematics

1 answer:

algol133 years ago

3 0

You could do 20 divided by 10 times 2 plus 1 to get 30

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According to the US Bureau of Labor Statistics publication News, self-employed persons with home-based businesses work a mean of

worty [1.4K]

Answer:

The answer is below

Step-by-step explanation:

Given that mean (μ) = 23 hours, standard deviation (σ) = 10 hours

a) The population is a group of self employed home based workers while the variable is the number of hours worked per week.

b) The mean of the distribution of sample means (also known as the Expected value of M) is equal to the population mean μ.

$\mu_x=\mu=23\ hours$

The standard deviation of the distribution of sample means is called the Standard Error of M, it is given by:

$\sigma_x=\sigma/\sqrt{n} =\frac{10}{\sqrt{100} }=1$

c) $\mu_x=\mu=23\ hours$

$\sigma_x=\sigma/\sqrt{n} =\frac{10}{\sqrt{1000} }=0.32$

d) The sample size has no effect on the mean, hence increasing the sample size does not change the mean.

The square root of sample size is inversely proportional to the standard deviation therefore increasing the sample size reduces the standard deviation.

5 0

3 years ago

Write a fraction with a denominator of 9. The fraction should be less than half

uysha [10]

Answer:

The only fraction i can think of is 2/9

Step-by-step explanation:

6 0

3 years ago

Look at the rectangle and the square:

VashaNatasha [74]

Answer:

She is incorrect

Step-by-step explanation:

Pythagorean theorem:

16^2+8^2

256+64=320

320 is 17.89

8^2+8^2

64+64=128

√128 is 11.31

Ada is incorrect. The length of diagonal SQ is bigger than the length of diagonal OM. But it is not two times bigger.

5 0

3 years ago

Use the drop down menus to describe the relationship between the number of teaspoons and number of tablespoon

Keith_Richards [23]

Answer:

From the given picture we can see that , 3 teaspoons = 1 table spoon.....(1)

or 3t=b..(2)

6 teaspoon= 2 tablespoon or 6t=2b

9 teaspoon= 3 table spoon or 9t=3b

Therefore the ratio of teaspoon to tablespoon t:b= 3:1...........(from (1))

Now, 1 tea spoon= $\frac{1}{3}\ tablespoon$ ..............[divide 3 on both sides of (1)]

or $t=\frac{1}{3}b$

The equation to show the relation between teaspoons and table spoon is given by (2)

3t=b

6 0

3 years ago

Read 2 more answers

Trigonometric equations <br><br> 2sin(theta) + 3 = 4

max2010maxim [7]

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

Let's solve for x ~

$\qquad \sf \dashrightarrow \:2 \sin(x) + 3 = 4$

$\qquad \sf \dashrightarrow \:2 \sin(x) = 4 - 3$

$\qquad \sf \dashrightarrow \:2 \sin(x) = 1$

$\qquad \sf \dashrightarrow \:\sin(x) = \frac{1}{2}$

$\qquad \sf \dashrightarrow \:x = 30 \degree \: \: or \: \: \frac{\pi}{6} \: rad$

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6 0

2 years ago

__÷__×(__+__) =30 how do u fill in the blank for this problem

÷×(+) =30 how do u fill in the blank for this problem