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3 years ago

Which of the following expressions are equivalent to(x + 5)^2?

Mathematics

1 answer:

jek_recluse [69]3 years ago

4 0

Answer:

$x^{2} +5x+5x+25\\x^{2} +10x+25$

Step-by-step explanation:

$(x+5)^{2} =x^{2} +10x+25$

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Suppose the weights of the Boxers at this club are Normally distributed with a mean of 166 pounds and a standard deviation of 5.

lesya [120]

Answer:

0.1994 is the required probability.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 166 pounds

Standard Deviation, σ = 5.3 pounds

Sample size, n = 20

We are given that the distribution of weights is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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$P( x > 167) = P( z > \displaystyle\frac{167 - 166}{1.1851}) = P(z > 0.8438)$

$= 1 - P(z \leq 0.8438)$

Calculation the value from standard normal z table, we have,

$P(x > 167) = 1 - 0.8006= 0.1994 = 19.94\%$

0.1994 is the probability that the mean weight of a random sample of 20 boxers is more than 167 pounds

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3 years ago

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Answer: D

Step-by-step explanation:

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Answer:

I think it would be (5,6)

Step-by-step explanation:

The formula is (y,-x).

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