2 years ago

Solve the systems of equations using elimination

Mathematics

1 answer:

inysia [295]2 years ago

5 0

Answer:

I can't show you BC I need paper to show u sorry

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Which values are solutions to the inequality below?<br> Check all that apply.<br> Sqrt x > 8

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19. The numerator of a fraction is 1 less than the denominator.

yulyashka [42]

Let the original fraction be

$\dfrac{n-1}{n}$

Now let's increase both numerator and denominator by 2:

$\dfrac{n+1}{n+2}$

This produces a 1/12 increase:

$\dfrac{n+1}{n+2}-\dfrac{n-1}{n}=\dfrac{1}{12}$

The left hand side can be rearranged as

$\dfrac{2}{n^2+2n}=\dfrac{1}{12}$

Invert both sides:

$\dfrac{n^2+2n}{2}=12 \iff n^2+2n=24$

Solve the quadratic equation:

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So, in the first case, the original fraction is

$\dfrac{n-1}{n}=\dfrac{-6-1}{-6}=\dfrac{7}{6}$

In the second case, we have

$\dfrac{n-1}{n}=\dfrac{4-1}{4}=\dfrac{3}{4}$

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3 years ago

I need help with my math

Kaylis [27]

so first to find the fraction to decimal you divide top by bottom next decimal to percent you move the decimal over back two and thats the answer and the other way around

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