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Tomtit [17]
3 years ago
13

What's the value of n? 9x27+2x31-28=n (SHOW WORK!!)

Mathematics
1 answer:
Karolina [17]3 years ago
7 0
N= 277
9×27 = 243
2×31 = 62
243+62 = 305
305-28=277
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Serga [27]

Um okay.

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3 years ago
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We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 21
katen-ka-za [31]

Answer:

F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996

Step-by-step explanation:

Data given and notation  

n_A = 21 represent the sampe size for A

n_B =16 represent the sample size for B

s_A = 28.284 represent the sample deviation for A

s_B = 20 represent the sample deviation for B

\alpha represent the significance level provided

F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:

F=\frac{s^2_1}{s^2_2}

Solution to the problem  

System of hypothesis

We want to test if we have the same variation, so the system of hypothesis are:

H0: \sigma^2_A = \sigma^2_B

H1: \sigma^2_A \neq \sigma^2_B

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F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996

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4 years ago
How many sides does a polygon have if the sum of the measure will of the interior is 10260
Klio2033 [76]

The polygon have 59 sides.

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<em>The sum of measure of interior angles of a polygon is (n – 2) × 180°.</em>

By this theorem,

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Divide by 180° on both sides.

$\frac{(n - 2) \times 180^\circ}{180^\circ}  = \frac{10260^\circ}{180^\circ}

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forsale [732]

Answer:

The length of the hypotenuse is 91.7

Step-by-step explanation:

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