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zhuklara [117]
3 years ago
15

Kevin has $25. MP3 downloads cost $0.75 each. How many songs can he download and still have $13 left to spend? Write an inequali

ty that represent Kevin’s situation.
Mathematics
2 answers:
vlada-n [284]3 years ago
6 0
Hi there!

Inequality:
25 - 0.75x <= 13

Since x is the amount of MP3 downloads he can buy and each CD costs 0.75 dollars, and since the total price spent needs to be less than 13 dollars and the total amount of money he has is 25 dollars, this is the answer.

Hope this helps!
stepladder [879]3 years ago
4 0
You need to subtract first
25-10=15
Then you divide it by the downloads cost which is 0.75
it would be 20
The answer is 20 MP3. He can by 20 and have 10 dollar left

Hope that helps!
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Answer:

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Step-by-step explanation:

You have the following quadratic equation given in the problem:

x^{2}-2x-3=12

You must make the equation equal to zero, as following:

x^{2}-2x-3-12=0

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Now, to factor the equation, you must find two numbers whose sum is -2 and whose product is -15. Therefore, you have:

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GalinKa [24]

The possible values of a + b are 0.89, 3.01 and -3.9

<h3>How to determine the value of a + b?</h3>

The given parameters are:

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Where:

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Take the cube of both sides

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a³ + 3a²(ib) + 3a(ib)² + (ib)³ = 24 + i3

Further, expand

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In complex numbers;

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Divide through by i

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So, we have:

a³ - 3ab² = 24

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Using a graphing tool, we have:

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Add these values

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SOVA2 [1]

Answer:

8\pi\text{ square cm}

Step-by-step explanation:

Since, we know that,

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h = height,

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Again differentiating with respect to r,

\frac{d^2S}{dt^2}=2\pi(\frac{\sqrt{16-4r^2}\times -16r + (-8r^2+16)\times \frac{1}{2\sqrt{16-4r^2}}\times -8r}{16-4r^2})

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-2.8, -2.6, -2.3

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