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2 years ago

My brother is 5 years older than I am. My sister is 3 years younger than I am.

Mathematics

1 answer:

Ymorist [56]2 years ago

4 0

Answer:

You were 5 years old.

Step-by-step explanation:

Brother is 5+x

X is your age.

5+x=10

-5 -5

x=5

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Explain why the function is discontinuous at the given number

Blizzard [7]

For $f$ to be continuous at $x=5$ , we need to have

$\displaystyle\lim_{x\to5}f(x)=f(5)$

Note that $x\to5$ means that $x\neq5$ , but that $x$ is *approaching* 5. We're told that for $x\neq5$ , we have

$f(x)=\dfrac{x^2-5x}{x^2-25}$

We can write

$\dfrac{x^2-5x}{x^2-25}=\dfrac{x(x-5)}{(x+5)(x-5)}=\dfrac x{x+5}$

and the limit would be

$\displaystyle\lim_{x\to5}\frac x{x+5}=\dfrac5{5+5}=\dfrac5{10}=\dfrac12\neq1=f(5)$

and so $f$ is discontinuous.

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nekit [7.7K]

Answer:

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Step-by-step explanation:

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2 years ago

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Step2247 [10]

Step-by-step explanation:

7x + 3x + 90= 180

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2 years ago

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LUCKY_DIMON [66]

Answer:

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Step-by-step explanation

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