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zimovet [89]
2 years ago
11

The Instructions are up above

Mathematics
1 answer:
likoan [24]2 years ago
3 0

Answer:

you mean below

Step-by-step explanation:

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The amount of money that Charlie saves each week is directly proportional to the amount he earns. Last week Charlie saved $32 on
Agata [3.3K]
If k is a constant of proportionality then we know from last week that
512= k ·32 so k=512/32=16;

This week 
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448=16· amount he saved
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8 0
3 years ago
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What is f–1(8)??<br><br> Please select the best answer
notka56 [123]

Answer:

f^{-1}(8)=\frac{3}{2}

Step-by-step explanation:

Given f(x)=2x+5

We have to find f^{-1}(8)

In order to find f^{-1}(x) we have to make x as the subject of the formula

Let us assume f(x)=y

⇒2x+5=y

Subtracting both sides by 5

2x+5-5=y-5

2x=y-5

Dividing both sides by 2

\frac{2x}{2}=\frac{y-5}{2}

⇒x=\frac{y-5}{2}

Now substituting y with x

we have f^{-1}(x)=\frac{x-5}{2}

Now f^{-1}(8)=\frac{8-5}{2}

=\frac{3}{2}

So option (ii) is correct


5 0
3 years ago
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Manda converted the following repeating decimal a fraction. Her work is shown below.
Murljashka [212]

Answer:

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Step-by-step explanation:

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