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bixtya [17]
3 years ago
13

HELP!!! DUE IN 8 MINS!! ​

Mathematics
1 answer:
BigorU [14]3 years ago
4 0

Answer:

Step-by-step B. is your answer

explanation:

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What’s this answer? Because I’m terrible at fractions and need some dang help lol
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X=9/11 - 7/11 = 2/11
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Solve for x 4/x + 4/x^2-9= 3/x-3
Goshia [24]

\dfrac{4}{x}+\dfrac{4}{x^2-9}=\dfrac{3}{x-3}\qquad\text{subtract}\ \dfrac{4}{x^2-9}\ \text{from both sides}\\\\\dfrac{4}{x}=\dfrac{3}{x-3}-\dfrac{4}{x^2-9}\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\\\\dfrac{4}{x}=\dfrac{3}{x-3}-\dfrac{4}{x^2-3^2}\\\\\dfrac{4}{x}=\dfrac{3}{x-3}-\dfrac{4}{(x-3)(x+3)}\\\\\dfrac{4}{x}=\dfrac{3(x+3)}{(x-3)(x+3)}-\dfrac{4}{(x-3)(x+3)}\qquad\text{use distributive property}\\\\\dfrac{4}{x}=\dfrac{3x+9-4}{(x-3)(x+3)}\\\\\dfrac{4}{x}=\dfrac{3x+5}{x^2-9}\qquad\text{cross multiply}

4(x^2-9)=x(3x+5)\qquad\text{use distributive property}\\\\4x^2-36=3x^2+5x\qquad\text{subtract}\ 3x^2\ \text{and}\ 5x\ \text{from both sides}\\\\x^2-5x-36=0\\\\x^2-9x+4x-36=0\\\\x(x-9)+4(x-9)=0\\\\(x-9)(x+4)=0\iff x-9=0\ \vee\ x+4=0\\\\\boxed{x=9\ \vee\ x=-4}

8 0
4 years ago
In the expression 3v - 8, what is the variable a= V b= - c= 3 d= 8
Jobisdone [24]

Answer:

a. v

Step-by-step explanation:

Given

3v - 8

Required

Identify the variable

Literary, variable means things that change in values;

Going by this definition, we have that:

3 -> This is not a variable because its value will always be 3

v -> This is a variable because its value can change once its value changes, the result of the expression will also change

- -> This is not a variable; it is an arithmetic operator to subtract

8 -> This is not a variable because its value will always be 8

Take for instance

v = 2

3v - 8 = 3 * 2 - 8 = 6 - 8 = -2

When v =5

3v - 8 = 3 * 5 - 8 = 15 - 8 = 7

<em>Notice that there's a difference in both results;</em>

<em>This is as a result of v being a variable</em>

4 0
3 years ago
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