Question

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Answer 1

Respuesta:

     $-\frac{28}{5}$  ;   La correcta es la opción   B )

Explicación paso a paso:

$f(x) = cx-12 ; f(15)=0 ; f(8) = ?$

$Solucion:$

$f(15) = c(15) -12=0$

$15c -12=0$

$15c = 12$

$c = \frac{12}{15} = \frac{4}{5}$

$c = \frac{4}{5}$

$Luego: f(x ) = cx -12 = \frac{4}{5} x-12$

$f(x) = \frac{4}{5} x -12$

$f(8) = \frac{4}{5} (8)-12= \frac{32}{5} -12=\frac{32-60}{5}$

$f(8) = \frac{-28}{5 }$