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ryzh [129]
3 years ago
5

Determine the domain of (f/g) (x) when f(x)=1/x and g(x)= sqrt x+5

Mathematics
2 answers:
ra1l [238]3 years ago
7 0

Answer:

all work is answer and shown and pictured

Lena [83]3 years ago
3 0
<h2>Answer:</h2>

The domain is:   {x > -5 and x≠0 }

<h2>Step-by-step explanation:</h2>

We are given a function f(x) and g(x) as follows:

f(x)=\dfrac{1}{x}

and

g(x)=\sqrt{x+5}

Now, the function (f/g)(x) is given by:

(\dfrac{f}{g})(x)=\dfrac{f(x)}{g(x)}

This means that:

(\dfrac{f}{g})(x)=\dfrac{\dfrac{1}{x}}{\sqrt{x+5}}

i.e.

(\dfrac{f}{g})(x)=\dfrac{1}{x\sqrt{x+5}}

Now we know that a square root function is defined if the radicand is positive.

i.e.

Here,

x+5 ≥ 0

i.e.

x ≥ -5

Also,

x≠0 and √(x+5)≠0

( otherwise the denominator will be zero and hence the expression will be not defined)

Hence, we have:

x≠0 and x≠ -5

This means that:

 x > -5 and x≠0

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When an oil tank is 7/12 full, it contains 5 1/4 gallons. How many gallons does it hold when full
blondinia [14]
<h3>Answer:</h3>

The tank can hold up to 9 gallons.

Quick Review:

By doing the inverse of 7/12, 12/7, when you multiply it, you'll get a value of 1.

7/12 * 12/7 = 1

Doing the Problem:

By multiplying 5 1/4 by 12/7, you'll get the answer. But first, convert 5 1/4 into an improper fraction.

5 1/4 ---> 21/4

Okay, lets go!

21/4 * 12/7 = 252/28

<u>When reduced, this gives you the answer 9/1, or 9 gallons.</u>

Hope that helps, :)

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Hope this helps! :)
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Answer:

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Step-by-step explanation:

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