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Illusion [34]
3 years ago
11

Eric has rock and classical CDs in his car. The number of rock CDs is 3 more than the number of classical CDs. Let c represent t

he number of classical CDs. Write an expression for the number of rock CDs.
Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
6 0

Answer:

Number of rock CDs = (C+3)

Step-by-step explanation:

Eric has rock and classical CDs in his car.

Let the number of classical CDs = c

Since Eric has rock CDs, which are 3 more than the number of classical CDs.

So expression to show this will be

Number of rock CDs = (C+3)

zimovet [89]3 years ago
3 0
3 times C like this. 3xC
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3 years ago
a manufacturer has determined that if his company sells x items per day then their profit is given by P=-x^2+ 700 x-10000 euros.
Radda [10]

Answer:

15

Step-by-step explanation:

To find the minimum amount of items, x, that need to be sold for the manufacturer to make a profit, we can use the quadratic formula

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x= \frac{-700+\sqrt{700^{2}-4(a)(-10000) } }{2(1)}; x= \frac{-700-\sqrt{700^{2}-4(a)(-10000) } }{2(1)}

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x=\frac{-700+100\sqrt{53} }{2}; x=\frac{-700-100\sqrt{53} }{2};

x=-350 + 50\sqrt53 = 14.005; x = -350 - 50\sqrt53 = -714.005

In context of the problem, we can only rely on the positive value, as the negative value would lead to a loss of profit.

(-714.005)^2+700(-714.005)-10000=-0.360

Furthermore, we must round to the nearest whole number, as you cannot make part of an item.

Lastly, if you were to plug in 14 into the equation for Profit, you would still have a negative number (i.e. a negative profit), thus requiring the manufacturer to make no less than 15 items to make a profit:

(14)^2+700(14)-10000=-4\\\\(15)^2+700(15)-10000=725

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Answer:

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Rewriting 8 as 2^3

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