What is $f(-9)$ if $f(x)=-7x+8$ ?

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Answer 1 · 2018-08-02T04:45:57

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If $f(x)=-7x+8$ ,

$f(-9)=71$

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Given:

We must find $f(-9)$ if $f(x)=-7x+8$

$f(x)=-7x+8$

Substitute the value $color(red)((x=-9)$

$rArr f(-9)=-7(-9)+8$

$rArr 63+8$

$rArr 71$

Hence, the answer is $color(blue)(71$

What is f(-9)f(-9) if f(x)=-7x+8f(x)=-7x+8?