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Sergio039 [100]
3 years ago
5

Alex buys a subscription to a streaming site. The function describes the 5.50m c=3+2 cost of the yearly subscription,c, in terms

of the number of months he uses the service. Would the set of integers be an appropriate domain for the function? What about the set of natural (or counting) numbers? The set of real numbers? Explain why or why not.
Mathematics
1 answer:
azamat3 years ago
3 0

Answer:

5.50 = c = 3 + 5 = 7c \\  \\ then \: divide \: 5.50to \: the7 \\  \\

Step-by-step explanation:

the answer u will get after

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Answer:

The vertex is at (1, -108).

Step-by-step explanation:

We have the function:

f(x)=3(x-7)(x+5)

And we want to find its vertex point.

Note that this is in factored form. Hence, our roots/zeros are <em>x</em> = 7 and <em>x</em> = -5.

Since a parabola is symmetric along its vertex, the <em>x-</em>coordinate of the vertex is halfway between the two zeros. Hence:

\displaystyle x=\frac{7+(-5)}{2}=\frac{2}{2}=1

To find the <em>y-</em>coordinate, substitute this back into the function. Hence:

f(1)=3((1)-7)((1)+5)=3(-6)(6)=-108

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Step-by-step explanation:

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