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slega [8]
3 years ago
15

If y varies inversely as x, and y = 4 as x = 8, find y for the x-value of 2.

Mathematics
1 answer:
anyanavicka [17]3 years ago
5 0
Because y varies inversely as x, instead of directly, you will need to multiply x by a fractional number (or divide x) in order to find y.
When x=8, y=4. Therefore, to find y, you need the "equation" y=(1/2)(x) or y=x/2.
So, when x=2, y=(1/2)(2) or y=2/2.
And so, y=1
Hope this helps!
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What are the vertical and horizontal asymptotes for the function f(x)=3^2/x^-4
Zarrin [17]

The vertical asymptotes x = - 2, 2 and Horizontal asymptotes y = 3

Option A is the correct answer.

<h3>What are Function?</h3>

Function are mathematical statement which links an independent variable to dependent variable.

It always comes with a defined domain and range.

The equation mentioned is incorrect in the question w.r.t. to the solutions mentioned, The right equation is

\rm f(x) = \dfrac{3 x^2}{x^{2}-4}

This function can also be written as

\rm f(x) = \dfrac{3 x^2}{x^{2}-2^2}\\\\\rm f(x) = \dfrac{3 x^2}{(x+2)(x-2)}

Vertical asymptotes are defined when the denominator of a rational function tends to zero.

To find the equation/s let the denominator equal zero.

Denominator tends to zero for x = -2 and x = +2

Horizontal Asymptote is when the function f(x) is tending to zero.

for x = +∞ and x = - ∞

Let the rational function f(x)= \dfrac{mx^a}{nx^b}  where  and a and b are degree of numerator and denominator.

If a < b , then the y axis y = 0 is a horizontal asymptote.

If b = a then horizontal asymptote is the line y = p/q

Here the value is b = 2 and a = 2

Since b = a the horizontal asymptote is the line

y = m/n  where m = 3 and n = 1

Therefore y = 3

So , vertical asymptotes x = - 2, 2

Horizontal asymptotes y = 3

Option A is the correct answer.

To know more about Function

brainly.com/question/12431044

#SPJ1

8 0
2 years ago
Solve StartFraction one-third over 5 endFraction = StartFraction a over 20 EndFraction
Anestetic [448]

Answer:

4/3

Step-by-step explanation:

i did it

6 0
3 years ago
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If 6x - 3 = 12 , what is the value of 12x + 8 ?​
Finger [1]

Answer:

You would first add 3 to 12 - 6x =15

x =2.5

12(2.5) = 30

Final value =38

Step-by-step explanation:

8 0
3 years ago
Let f(x) = -4x - 2 and g(x) = 5x - 6. Find f*g and state its domain.
elixir [45]

Answer:  The answer is (c) -20x^2+14x-12;\textup{ all real numbers.}

Step-by-step explanation:  Given that there are two functions f and g, defined by

f(x)=-4x-2,\\\\g(x)=5x-6.

We are to find f*g and also its domain.

(f*g)(x)\\\\=f(x)g(x)\\\\=(-4x-2)(5x-6)\\\\=-20x^2+24x-10x-12\\\\--20x^2+14x-12.

Also, its domain will be all real numbers, since the function f*g is defined at all 'x' in real numbers.

Thus, the correct option is

-20x^2+14x-12.

6 0
3 years ago
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What is 62.5 percent in two equevelent forms
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62.5% - percent
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