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prohojiy [21]
3 years ago
12

In the year 2005, the average cost of a car could be modeled by the equation C= -15x^2 + 20x - 3 where x is the number of years

since 2005. By the year 2010 the average cost had changed, and the equation could be modeled by C= -10x^2 + 30x - 2. Find the difference in average cost equation for cars between 2005 and 2010.
Mathematics
1 answer:
Rudiy273 years ago
8 0

Answer:

5x^2+10x-3

Step-by-step explanation:

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A rancher has 2 comma 200 feet of fencing to enclose a rectangular pig pen.​ However, one side of the pen lies along a river and
DiKsa [7]

Answer:

A = 2200x - 2x^2

Step-by-step explanation:

Let's x be the length of the side that is NOT the same as the side along the river (or in opposite). From the fencing perimeter of 2200ft we can calculate the other side y of the rectangular:

y = 2200 - 2x

The area A of the pen would be the product of the 2 sides

A = xy = x(2200 - 2x) = 2200x - 2x^2

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PLEASE HELP ME!!!!!!!!!!
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Answer:

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Step-by-step explanation:

To find the slope of a line, you need to find the \frac{rise}{run} between two points. I will be using the points (-3, 5) and (7, -2).

\frac{rise}{run} = \frac{-2-5}{7-(-3)}

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8 0
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What’s the answer for x??
zubka84 [21]

Answer:

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or, 3x= 85- 21

or, 3x= 64

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Step-by-step explanation:

the value of x is 21.3

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sveticcg [70]
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3 years ago
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