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3 years ago

(29-8) divided (7-4)=

Mathematics

2 answers:

Nataly_w [17]3 years ago

4 0

Answer:

Step-by-step explanation:

its not that hard lol

n200080 [17]3 years ago

3 0

Hey there!

$\bold{\frac{(29-8)}{(7-4)}}$
$\bold{29-8=21}$
$\bold{\frac{21}{(7-4)}}$
$\bold{7-4=3}$
$\bold{\frac{21}{3}=7}$
$\boxed{\boxed{\bold{Answer:7}}}$ $\checkmark$

Good luck on your assignment and enjoy your day!

~ $\bold{LoveYourselfFirst:)}$

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Georgette created a factor tree and wrote the prime factorization of 72 shown here. A factor tree of 72. 72 branches to 8 and 9.

Vsevolod [243]

Answer:

Georgette did not complete the factorization; 9 is a composite number.

Step-by-step explanation:

9 can be broken down to 3x3

So it the prime factorization of 72 should be 2x2x2x3x3

7 0

3 years ago

Because of staffing decisions, managers of the Gibson-Marimont Hotel are interested in the variability in the number of rooms oc

Anit [1.1K]

Answer:

a) $\hat \sigma^2 =s^2 =30^2 = 900$

b) $567.277 \leq \sigma^2 \leq 1690.224$

Rounded to the nearest number would be:

$567 \leq \sigma^2 \leq 1690$

c) $23.818 \leq \sigma \leq 41.112$

And rounded :

$23.8 \leq \sigma \leq 41.1$

Step-by-step explanation:

Data given and notation

s=30 represent the sample standard deviation

$\bar x=290$ represent the sample mean

n=20 the sample size

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

Part a

The best point of estimate for the population variance is the sample variance, so on this case:

$\hat \sigma^2 =s^2 =30^2 = 900$

Part b

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=20-1=19$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical values.

The excel commands would be: "=CHISQ.INV(0.05,19)" "=CHISQ.INV(0.95,19)". so for this case the critical values are:

$\chi^2_{\alpha/2}=30.144$

$\chi^2_{1- \alpha/2}=10.117$

And replacing into the formula for the interval we got:

$\frac{(19)(30)^2}{30.144} \leq \sigma \leq \frac{(19)(30)^2}{10.117}$

$567.277 \leq \sigma^2 \leq 1690.224$

Rounded to the nearest number would be:

$567 \leq \sigma^2 \leq 1690$

Part c

In order to find the confidence interval for the deviation we just need to take the square root for the interval of the variance, and we got:

$23.818 \leq \sigma \leq 41.112$

And rounded :

$23.8 \leq \sigma \leq 41.1$

7 0

3 years ago

Determine the equation of the line that is parallel to y=23x+4 and passes through the point (3,7).

Licemer1 [7]

Answer: y = 23x - 62

<u>Step-by-step explanation:</u>

Parallel lines have the same slope.

y = 23x + 4

m=23 b=4

Input x = 3, y = 7, & m = 23 into the Point-Slope formula to find the equation or the Slope-Intercept formula to find b (you already have m). I will choose the latter.

y = mx + b

7 = 23(3) + b

7 = 69 + b

-62 = b

m = 23, b = -62 --> y = 23x - 62

6 0

3 years ago

How to show how to find the answer to -3 +4 -1

Fittoniya [83]

Answer:it’s 0

Step-by-step explanation:

You do -3 plus 4 and then minus 1 which would be 0

5 0

3 years ago

There are twelve cards labeled from 1 to 12 in a box. A card is randomly drawn from the box.

CaHeK987 [17]

The answer is C, 2/3. 1, 3, 5, 6, 7, 9, 11, and 12 are possible draws. 8/12 is equal to 2/3!

6 0

4 years ago

Read 2 more answers