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inysia [295]
3 years ago
15

Study the function below and then answer the questions that follow.

Mathematics
2 answers:
Licemer1 [7]3 years ago
4 0

Answer:

Domain: all real values of x except -2

Range: y > -4

Step-by-step explanation:

Domain: union of all intervals of x

x < -2 U -2 < x < 0 U x》0

This includes all real values of x except x = -2

When x < -2

-x - 2 > 0

When -2 < x < 0

-4 < -x² < 0

When x》0

x》0

Range is the union of all these outputs

y > 0 U -4 < y < 0 U y》0

y > -4

NeX [460]3 years ago
3 0

Answers and Step-by-step explanations:

Notice that -2 is not included in the inequality, but any other number is. That means that the domain is all real numbers except x = -2.

For the range, I recommend you draw a graph (see the attachment).

As can be seen, the range will be y > -4.

Hope this helps!

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The telephone company offers two billing plans for local calls. Plan 1 charges ​$27 per month for unlimited calls and Plan 2 cha
mylen [45]

Answer:

<h2>0.05x+11<27 for x<=320</h2>

Step-by-step explanation:

Step one:

Plan 1

charges = $27 monthly

the total charges is expressed as

y=27------1

Plan 2

charges= $11 monthly

extral= $0.05 per call

let x be the number of calls

the total is expressed linearly as

y=0.05x+11--------2

Step two:

equating 12 and 2 we have

27=0.05x+11

collect like terms

27-11=0.05x

16=0.05x

divide both sides by 0.05

x=16/0.05

x=320

the inequality for which plan A is more economical is

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3 0
3 years ago
If 27^x=9/3^x ,then the value of x is
Korolek [52]

Answer:

x = 0.5

Step-by-step explanation:

Well, we have in this case a exponent equation

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Factoring 27 = 3^{3}

Our new equation is:

3^{3x}=\frac{3^{2}}{3^{x}}

Applying the property of exponents, on the right we'll have just like that:

3^{3x} = 3^{2-x}

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3x = 2 - x

3x + x = 2

4x = 2

x = 1/2 or 0.5

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Step-by-step explanation:

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Step-by-step explanation:

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