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3 years ago

I don't understand the first one.

Mathematics

2 answers:

Mekhanik [1.2K]3 years ago

8 0

No the 6 times 8 is 48 and the 9 times 12 is 108

zaharov [31]3 years ago

3 0

If it is the one with the rugs then yes 6/8 and 9/12 both equal 3/4 when you reduce

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Help.tttttttttlloppp

DochEvi [55]

Answer:

I think it is 20.75°

Step-by-step explanation:

An interesting problem!

the m arcVYX = 282° so the m arcVYXV must equal 360°

so the m arcVX must equal 360 - 282 = 78°

I beleive m angle UVX - m arcVX = 78°

78 = 4x - 5

83 = 4x

20.75° = x

I don't like this answer. I would normally exspect whole numbers for most algebra problems

8 0

3 years ago

Adecco Workplace Insights Survey sampled men and women workers and asked if they expected to get a raise or promotion this year

fgiga [73]

Answer:

(a) Null Hypothesis, $H_0$ : $p_1-p_2$ $\leq$ 0 or $p_1$ $\leq$ $p_2$

Alternate Hypothesis, $H_a$ : $p_1-p_2$ > 0 or $p_1$ > $p_2$

(b) $\hat p_1$ = sample proportion of men = $\frac{104}{200}$ = 0.52

$\hat p_2$ = sample proportion of women = $\frac{74}{200}$ = 0.37

(c) P-value is 0.0011.

Step-by-step explanation:

We are given that Adecco Workplace Insights Survey sampled men and women workers and asked if they expected to get a raise or promotion this year (USA Today, February 16, 2012).

Suppose the survey sampled 200 men and 200 women. If 104 of the men replied yes and 74 of the women replied yes.

Let $p_1$ = population proportion of men who replied yes

$p_2$ = population proportion of women who replied yes

(a) Null Hypothesis, $H_0$ : $p_1-p_2$ $\leq$ 0 or $p_1$ $\leq$ $p_2$ {means that the population proportion of men is less than or equal to the population proportion of women}

Alternate Hypothesis, $H_a$ : $p_1-p_2$ > 0 or $p_1$ > $p_2$ {means that the population proportion of men is more than the population proportion of women}

(b) $\hat p_1$ = sample proportion of men = $\frac{104}{200}$ = 0.52

$\hat p_2$ = sample proportion of women = $\frac{74}{200}$ = 0.37

The test statistics that will be used here is Two-sample z proportion statistics;

T.S. = $\frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1} +\frac{\hat p_2(1-\hat p_2)}{n_2} } }$ ~ N(0,1)

where, $\hat p_1$ = sample proportion of men who replied yes = 0.52

$\hat p_2$ = sample proportion of women who replied yes = 0.37

$n_1$ = sample of men = 200

$n_2$ = sample of women = 200

So, test statistics = $\frac{(0.52-0.37)-(0)}{\sqrt{\frac{0.52(1-0.52)}{200} +\frac{0.37(1-0.37)}{200} } }$

= 3.05

Now at 0.01 significance level, the z table gives critical value of 2.3263 for right-tailed test. Since our test statistics is more than the critical value of z so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.

Therefore, we conclude that the population proportion of men is greater than the population proportion of women.

P-value is given by the following formula;

P(Z > 3.05) = 1 - P(Z $\leq$ 3.05)

= 1 - 0.99886 = 0.0011

Hence, the p-value is 0.0011.

8 0

3 years ago

What is 829 rounded to the nearest ten

Allisa [31]

829 is rounded to 830 because the 9 is greater than 4 so its going to be rounded up.

8 0

2 years ago

Help................

Rina8888 [55]

Answer: DB is 5

Step-by-step explanation:

Alright, lets get started.

Since given that AD is parallel to CB.

And AB is parallel to CD.

And the angle A is given as 90°

It means the given figure is a rectangle.

And the diagonals of the rectangle are equal to each other.

So, $DB=AC$

So, $DB=5$

Hence the answer is 5 ... Answer

Hope it will help :)

4 0

2 years ago

Reflect over x-axis PLEASE HELP

Alinara [238K]

Point f ends up being (-4,-5)
point d is (-5,-1)
and point e is (4,-1)

6 0

3 years ago