3 years ago

Given ƒ(x) = 8x + 25, find x when ƒ(x) = 9. A) −2 B) −1 C) 0 D) 2

Mathematics

2 answers:

Zielflug [23.3K]3 years ago

8 0

A)-2
9=8x+25
-16=8x
x=-2

aniked [119]3 years ago

5 0

A) -2

9=8x+25
-16=8x
-2=x

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$\begin{aligned}\implies \sf mean\:height & =\dfrac{(20 \times 1.67)+(16 \times 1.50)+(14 \times 1.40)}{50}\\\\ & = \dfrac{33.4+24+19.6}{50}\\\\ & = \dfrac{77}{50}\\\\ & = 1.54\:\: \sf m\end{aligned}$

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2 years ago

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