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Reil [10]
3 years ago
9

A Web music store offers two versions of a popular song. The size of the standard version is 2.3 megabytes (MB). The size of the

high-quality version is 4.1 MB. Yesterday, there were 1310 downloads of the song, for a total download size of 4597 MB. How many downloads of the standard version were there?
Mathematics
1 answer:
denis-greek [22]3 years ago
3 0
2.3x+4.1(1310-x)=4597
Solve for x
2.3x+5,371-4.1x=4597
2.3x-4.1x=4597-5371
−1.8x=−774
X=-774/-1.8
X=430 standard version
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If f(x) = x ² +1 and g(x) =3x+ 1,find [f(4)] ²
guajiro [1.7K]

Answer:

289

Step-by-step explanation:

We don't need g at all for this.

We will need to know f(4) before continuing...

f(4) can be found by replacing x in f(x)=x^2+1 with 4:

f(4)=4^2+1

f(4)=16+1

f(4)=17

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Now let's find [f(4)]^2:

[f(4)]^2

[17]^2

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289

3 0
3 years ago
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Artemon [7]
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4 0
4 years ago
What is the value of x in this figure?
slega [8]
Check the picture below.

\bf 10\cdot \stackrel{cos(30^o)}{\cfrac{\sqrt{3}}{2}}=x\implies 5\sqrt{3}=x

5 0
3 years ago
$43 shirt; 6% tax round to the nearest cent
Aleksandr-060686 [28]
If you would like to know how much did the shirt cost after 6% tax, you can calculate this using the following steps:

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7 0
4 years ago
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weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of 50. find the probabil
GalinKa [24]

Answer:

47.5%

Step-by-step explanation:

Find the z-scores:

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z₁ = (300 − 400) / 50 = -2

z₂ = (400 − 400) / 50 = 0

300 is 2 standard deviations below the mean, and 400 is 0 standard deviations from the mean.

From the empirical rule, 95% of a normal distribution is between -2 and +2 standard deviations.  Since normal distributions are symmetrical, that means half of that is between -2 and 0 standard deviations.

95% / 2 = 47.5%

3 0
3 years ago
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