3 years ago

Which expressions are equivalent to x² +4?

Mathematics

1 answer:

n200080 [17]3 years ago

8 0

Answer:

4x2

Step-by-step explanation:

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Put this equation in standard form Y+5=-(x+3)?

lisabon 2012 [21]

Answer: y = x - 2

Step-by-step explanation:

Subtract 5 from both sides.

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3 years ago

(4x2 – 6x + 2) + (-5x2 + 6x – 6)

lys-0071 [83]

$(4*2-6x+2)+(-5x2+6x-6)$
$8-6x+2+(-5)*2+6x-6$
$8-6x+2-10+6x-6$
$\not 10-6x-\not10+6x-6$
$-6x+6x-6$
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The answer is: -6

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4 years ago

Find the variance of this probability distribution. Round to two decimal places.

attashe74 [19]

Answer:

Variance = 4.68

Step-by-step explanation:

The formula for the variance is:

$\sigma^{2} =\frac{\Sigma(X- \mu)^{2}}{N} \\or \\ \sigma^{2} =\frac{\Sigma(X)^{2}}{N} -\mu^{2} \\$

Where:

$X: Values \\\mu: Mean \\N: Number\ of\ values$

The mean can be calculated as each value multiplied by its probability

$\mu = 0*0.4 + 1*0.3 + 2*0.1+3*0.15+ 4*0.05=1.15$

$\frac{\Sigma (X)^{2}}{N} =\frac{(0^{2}+1^{2}+2^{2}+3^{2}+4^{2})}{5} =6$

Replacing the mean and the summatory of X:

$\sigma^{2} = \frac{\Sigma(X)^{2}}{N} -\mu^{2} \\= 6 - 1.15^{2}\\= 4.6775$

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4 years ago

What is the domain and range of y=4x+4

Mnenie [13.5K]

The domain is all real numbers

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3 years ago

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What does x = in this equation x+3+2x=x+5

Ede4ka [16]

Answer:

X would be equal to 1

Step-by-step explanation:

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4 years ago

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