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2 years ago

If n is a positive even number,then (-55) n is

Mathematics

2 answers:

monitta2 years ago

7 0

Answer: (-55)m is a negative even number.

Step-by-step explanation: We are given to write the properties of the number (-55)n if n is a positive even number.

Let n = 2m, where m is positive.

So, we get

$(-55)n=(-55)\times2m=-110m.$

We know that

-110m is a negative even number for any positive number m.

Thus, (-55)m is a negative even number.

Marysya12 [62]2 years ago

6 0

$Then\\if\ is\ (-55)\cdot n,\ then\ (-55)n\ is\ a\ negative\ number\\\\if\ is\ (-55)^n,\ then:\\-if\ n\ is\ odd,\ then\ (-55)^n\ is\ a\ negative\ number\\-if\ n\ is\ even,\ then\ (-55)^n\ is\ positive\ number.$

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2 years ago

The product of twice a number and six is the same as the difference of eleven times the number and 6/5 . Find the number

Rom4ik [11]

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Step-by-step explanation:

solution;

let,the number be x,

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3 0

3 years ago

The Director of Admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall sem

VMariaS [17]

Answer:

Variance = 24900

Standard Deviation = 157.7973

Step-by-step explanation:

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Number of admissions: 1000 1200 1500

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Formula:

$E(x) = \displaystyle\sum x_iP(x_i)\\E(x) = 1000(0.6) + 1200(0.3) + 1500(0.1)\\E(x) = 1110\\E(x^2) = \displaystyle\sum x_i^2P(x_i)\\E(x^2) = (1000)^2(0.6) + (1200)^2(0.3) + (1500)^2(0.1)\\E(x^2) = 1257000$

Variance =

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Thus, the variance is 24900.

Standard Deviation =

$\sigma = \sqrt{\sigma^2} = \sqrt{24900} = 157.7973$

Thus, the standard deviation is 157.7973

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2 years ago