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Evgesh-ka [11]
2 years ago
14

3.9p − 7.53 = 8p + 9.77 + 8.94

Mathematics
1 answer:
Tamiku [17]2 years ago
8 0

The answer is P= -6.4 Good luck

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Consider the function f(x)= 2/5x-4
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Let f(x) = y

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y=\frac{2}{5}x-4

Switching x to y , we get

x=\frac{2}{5}y-4

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b) . Use composition to show that f(x) and g(x) are inverses of each other.

\mathrm{For}\:f=\frac{2}{5}x-4\:\\\\\mathrm{substitute}\:x\:\mathrm{with}\:g\left(x\right)=\frac{5}{2}x+10\\\\=\frac{2}{5}\left(\frac{5}{2}x+10\right)-4\\\\=x

Similarly,

\mathrm{g\left(x\right)=\frac{5}{2}x+10,\:f\left(x\right)=\frac{2}{5}x-4,\:g\left(x\right)\circ \:f\left(x\right)}\\\\\mathrm{For}\:g=\frac{5}{2}x+10\:\mathrm{substitute}\:x\:\mathrm{with}\:f\left(x\right)=\frac{2}{5}x-4\\\\=\frac{5}{2}\left(\frac{2}{5}x-4\right)+10\\\\=x

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