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dybincka [34]
3 years ago
13

Let f(x) = 3x +5 and g(x) = -4x +7. Find (fog)(-4)

Mathematics
1 answer:
sesenic [268]3 years ago
7 0
(fog)(x)=f(g(x))

f(g(x))=3(-4x+7)+5
f(g(-4))=3(-4(4)+7)+5=3(-16+7)+5=3(-9)+5=-27+5=-22


(fog)(-4)=-22
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Step-by-step explanation:

When the selection has to be made without considering the order of selection, combinations are used.

The formula for combination is:

C(n,r) = \frac{n!}{r!(n-r)!}

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Putting the values in the formula

C(13,5) = \frac{13!}{5!(13-5)!}\\=\frac{13!}{5!8!}\\=1287\ ways

Five pieces can be selected in 1287 ways

Keywords: Combinations, selection

Learn more about combinations at:

  • brainly.com/question/11203617
  • brainly.com/question/11253316

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Step-by-step explanation:

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