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Mathematics

1 answer:

enyata [817]2 years ago

5 0

9514 1404 393

Answer:

451.6 km

Step-by-step explanation:

You can write the proportion ...

distance in km/distance in miles = 1/0.62 = x/280

Multiplying by 280 gives x:

x = 280/0.62 ≈ 451.61

The distance between Lowell and Shelby is 451.6 km.

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Complete the equation. (x-2)(x^2 + 2x + 4) = ( , )

yanalaym [24]

Answer:

Step-by-step explanation:

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2 years ago

17. When a single set of values is randomly divided into two equal groups, explain how the means of these two groups may be very

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If you take 2 groups of equal cardinality, it could happen that, for example, many of the higher values go to the first group and therefore, many of the low values go to the second group, making their respective means quite different and different from the original sample mean. This could even go worse due to the possible existence of outliers, that is, values that are far different than the sample mean. An outlier tend to disrup the mean of a sample, but for smaller samples the result is much dramatic.

For example, let X be {1,2,3,4,5,6,7,8,9,100}

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Z = {4,6,7,8,100}

The elements of Y sum 20, so its mean is 4

The elements of Z sum 125, so its mean is 25

Both means are quite different from each other and quite different from the mean of X. Note that if we take the mean of the means the result is 4+25/2 = 14,5 which is equal to the mean of X.

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3 years ago

if the probability that the islanders will beat the rangers in a game is 0.44,what is the probability that the islanders will wi

Rama09 [41]

Answer:

30.91% probability that the islanders will win exactly one out of four games in a series against the rangers

Step-by-step explanation:

For each game, there are only two possible outcomes. Either the Islanders win, or they do not. The probability of the Islanders winning a game is independent of other games. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$