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Alika [10]
3 years ago
15

Profit is the difference between revenue and cost. The revenue, in dollars, of a company that makes skateboards can be modeled b

y the polynomial 2x3 + 30x – 130. The cost, in dollars, of producing the skateboards can be modeled by 2x3 – 3x – 520. The variable x represents the number of skateboards sold. What expression represents the profit?
A. 27x – 650
B. 27x + 390
C. 33x – 650
D. 33x + 390
Mathematics
3 answers:
abruzzese [7]3 years ago
8 0

Answer:

We need to subtract both equations. 2x3+30x-130-2x3+3x+520

that gives

30x-130+3x + 520

33x+390

D is answer

alexdok [17]3 years ago
7 0

Answer:

D. 33x + 390

Step-by-step explanation:

Profit is the difference between revenue and cost so subtract the given polynomials:

2x³ + 30x – 130 - (2x³ – 3x – 520) = 2x³ <em>+ 30x</em> <u>– 130</u> -2x³<em>+3x</em><u>+520 </u>

combine like terms: 33x +390

Angelena2 years ago
0 0

the answer is d

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Answer:

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Step-by-step explanation:

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Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

And for this case the 95% confidence interval is given by (2.13; 2.37)

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And for the margin of error we have the following estimation:

ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62

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