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3 years ago

Is my answer correct?

Mathematics

2 answers:

Alexandra [31]3 years ago

8 0

Yes your answer would be correct! :)

AURORKA [14]3 years ago

7 0

Yes it isn't correct

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Solve equation, check for extraneous solutions

fiasKO [112]

Start with

$1=\dfrac{1}{n^2}+\dfrac{n^2-4n-5}{3n^2}$

We observe that both fractions are not defined if $n=0$ . So, we will assume $n \neq 0$ .

We multiply both numerator and denominator of the first fraction by 3 and we sum the two fractions:

$1=\dfrac{3}{3n^2}+\dfrac{n^2-4n-5}{3n^2} = \dfrac{n^2-4n-2}{3n^2}$

We multiply both sides by $3n^2$ :

$n^2-4n-2=3n^2$

We move everything to one side and solve the quadratic equation:

$2n^2+4n+2=0 \iff 2(n^2+2n+1)=0 \iff 2(n+1)^2=0 \iff n+1=0 \iff n=-1$

We check the solution:

$1=\dfrac{1}{1}+\dfrac{1+4-5}{3} \iff 1 = 1+0$

which is true

8 0

3 years ago

PLEASE HELP!!! I am stuck!

labwork [276]

1/3 has the largest value.

4 0

2 years ago

Read 2 more answers

Hi, please help me :)

bearhunter [10]

Answer:

D. Linear

The answer is negative linear, because when it incresing from 0 to 1 to 2 to 3 (year) it always deacreasing in the value($).

4 0

2 years ago

What is the area of the square

alexdok [17]

Answer:

Step-by-step explanation:

(x-10)^2=(x-10)(x-10)=(x^2-10x-10x+100)=x^2-20x+100

6 0

3 years ago

Solve for x: 0.75x-0.25=3.5

exis [7]

Answer:

x=5

Step-by-step explanation:

3.5=0.75x-0.25

add 0.25 to 3.5

3.75=0.75x

divide 3.75 by 0.75

x=5

4 0

2 years ago