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3 years ago

5

Which sentence is the most accurate definition of an identity?

2 answers:

olga2289 [7]3 years ago

7 0

The <em>correct answer</em> is:

An identity is an equation that is true for all real numbers.

Explanation:

An identity is a mathematical statement that is always true. It does not matter what numbers you substitute in for the variables, the result will be the same.

Goryan [66]3 years ago

7 0

I think the correct answer from the choices listed above is the second option. The most accurate definition of an identity is that an identity is an equation that is true for all real values in its domain. It is also an equality relation that no matter what values are chosen the equation is still true.

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Express 1/3 as a repeating decimal and round to the nearest hundredth.

katrin [286]

Answer:

1/3 is .333... so you can write .33.... or .33 with a line on top of the 3's

Step-by-step explanation:

.3 is in the tenths and .33 is in the hundredths place

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3 years ago

Simplify (3x^-2y^4)^-3

Anuta_ua [19.1K]

Answer:

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Step-by-step explanation:

(3. 1?x^2 y^4)^3

(3y^4/x^2)^3

witch you get x^6/27y^12

hope i helped

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3 years ago

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4 years ago

Read 2 more answers

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serious [3.7K]

Answer:

30

Step-by-step explanation:

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3 years ago

The height, in inches, of a randomly chosen American woman is a normal random variable with mean μ = 64 and variance 2 = 7.84. (

Schach [20]

Answer:

Step-by-step explanation:

Given that the height in inches, of a randomly chosen American woman is a normal random variable with mean μ = 64 and variance 2 = 7.84.

X is N(64, 2.8)

Or Z = $\frac{x-64}{2.8}$

a) the probability that the height of a randomly chosen woman is between 59.8 and 68.2 inches.

$=P(59.8$

b) $P(X\geq 59)\\= P(X\geq -1.78)\\ \\=0.9625$

c) For 4 women to be height 260 inches is equivalent to

4x will be normal with mean (64*4) and std dev (2.8*4)

4x is N(266, 11.2)

$P(4x>260)= \\P(Z\geq -0.53571)\\=0.7054$

d) Z is N(0,1)

E(Z19) = $P(Z>19)\\= 0.000$

since normal distribution is maximum only between 3 std deviations form the mean on either side.

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3 years ago