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Radda [10]
3 years ago
10

Joseph owes his older brother $15, so he has a balance of -$15 with his brother . Joseph borrows more money from his brother ,br

inging his balance to 5 times of the previous amount what is Joseph's new balance with his brother
Mathematics
1 answer:
seraphim [82]3 years ago
4 0
Just multiple 5 and 15
He owes his brother $75 so the balance is -$75
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kupik [55]
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6 0
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mamaluj [8]

Answer:

<h2>0</h2>

Step-by-step explanation:

METHOD 1.

We know:

f\bigg(f^{-1}(x)\bigg)=x

Therefore

f\bigg(f^{-1}(0)\bigg)=0

METHOD 2.

\text{Find}\ f^{-1}(x)

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exchange x to y and vice versa:

x=3y+12

solve for y:

3y+12=x          <em>  subtract 12 from both sides</em>

3y=x-12        <em>divide both sides by 3</em>

y=\dfrac{x-12}{3}\to f^{-1}(x)=\dfrac{x-12}{3}

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f\bigg(f^{-1}(x)\bigg)=3\cdot\dfrac{x-12}{3}+12=x-12+12=x

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f\bigg(f^{-1}(0)\bigg)=0

METHOD 3.

\text{Find}\ f^{-1}(x)

f^{-1}(x)=\dfrac{x-12}{3}

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f^{-1}(0)=\dfrac{0-12}{3}=\dfrac{-12}{3}=-4

Calculate the value of <em>f(x)</em> for x = -4:

f(4)=3(-4)+12=-12+12=0

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