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3 years ago

(Brainliest at Random!!!!!!!!!!!!!!!)

Mathematics

1 answer:

GuDViN [60]3 years ago

3 0

Answer:

the last one.

(x^3)^3--3^2

x^6-3^2

x^6-9

(x^3)^3--3^2

Step-by-step explanation:

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Given f(x) 2^x -7 find the x intercepts

brilliants [131]

Be sure to include the "=" sign: <span>f(x) = 2^x -7

To find the x-intercepts, set f(x) = 0 and solve for x: 2^x - 7 = 0,
or
2^x = 7

Take the common log of both sides: x log 2 = log 7
log 7
Solve for x: x = --------- = 2.81 (approx)
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</span>

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3 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

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

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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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3 years ago

Write an equation through the line point (-2,5) with slope 4

dybincka [34]

Answer:

Step-by-step explanation:

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3 years ago

PLEASE HELP ME!!

antoniya [11.8K]

Since your slope is 3, (the number for slope is always right before x) and your y-intercept is one (that is always the number after the x) your answer would be B

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3 years ago

What is the sum of 4 and its additive inverse

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Answer:

Step-by-step explanation:

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