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LekaFEV [45]
3 years ago
8

Worth 33 points each!!

Mathematics
2 answers:
zalisa [80]3 years ago
7 0
I think answer is 319
gogolik [260]3 years ago
3 0

Where <em>x </em>is the number of books sold, <em>i </em>is income, and <em>c </em>is cost:

<em>c = 4x + 3500 </em> ($4 per book plus the 3500 flat marketing fee)

<em>i = 15x </em>($15 per book)

You are looking for the point where these intersect: the intersection is where the income is equal to the cost, and at any point after that the income is greater than the cost. So, set the equations equal to each other:

<em>4x + 3500 = 15x     </em>

subtract 4x from both sides

<em>3500 = 11x</em>              

divide both sides by 11

<em>x = 318.181818</em>

So, you would have to sell a minimum of 319 books in order to make a profit.

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Let's check all functions.
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3. f(x)=x²<span>+2x when evaluated with -3 gives you the value of 3
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4. f(x)=x²-3x when evaluated with -3 gives you the value of 3
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Thus, g = 2b.

</span><span>Second, Bill's page contains 50 fewer words than Charlie's page.

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We can express that as 2b - c = 210.

Now we need to find b, since it represents Bill's page.

We can substitute b for (c - 50) since b = c - 50, into the equation 2b - c = 210. This makes it 2(c - 50) - c = 210.

We can expand this to 2c - 100 - c = 210.

We can simplify this to c - 100 = 210.

Add 100 to both sides.

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Now that we know c, we can use the first equation to find b.

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