What is the domain of f(x)=

Mathematics

1 answer:

asambeis [7]2 years ago

3 0

Answer: All real numbers

Step-by-step explanation:

The domain is the set of inputs.

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Pete’s Electric charges $75 plus $30 per hour of work while Greg’s Electric charges $45 plus $45 per hour. How many hours must e

viktelen [127]

H: hours
45h + 45 = 30h + 75
15h + 45 = 75
15h = 30
h = 2 hours

45 ( 2 ) + 45 = 30 ( 2 ) + 75
90 + 45 = 60 + 75
135 = 135

Therefore the awnser is 2 hours.

8 0

3 years ago

I need help you don’t have to give the answer just a little explanation

Brums [2.3K]

a. let k = constant

k = y/x

so k = 14/2 = 7

b. the equation would be y = 7x

2. a. k = y/x = 25/5 = 5

b. y = 5x

c. 50 = 5x, x = 50/5 = 10

4 0

4 years ago

What's the domain and range for (×+4)-1

Sonja [21]

$\bf a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad

\cfrac{1}{a^{ n}}\implies a^{-{ n}}\\
---------------\\
thus\\
(x+4)^{-1}\implies \cfrac{1}{x+4}
\\\\
$
$\bf if\qquad \cfrac{1}{0} \implies$ undefined

so.. what value of "x" makes x+4 to 0?

the domain will be, all real numbers, except that value

about the range, "y" will take, whateve "x" can provide.. in this case... I think is all real numbers, except 0, because, if you give a few big values to "x", the fraction will simply have a bigger and bigger denominator, making the fraction smaller and smaller, ever approaching 0, but never getting there

7 0

3 years ago

00 pts

777dan777 [17]

Answer:

$a_n=6\cdot (-1)^n$