3 years ago

If f(x)=5x+40,what is f(x) when x= -5?

Mathematics

2 answers:

makkiz [27]3 years ago

4 0

Answer:

Step-by-step explanation:

f(x)=5(-5)+40

f(x)=-25+40

f(x)=15

snow_tiger [21]3 years ago

3 0

Answer:

$f(-5) = 15$

Step-by-step explanation:

$f(-5) = 5(-5) + 40$

$f(-5) = (-25) + 40$

$f(-5) = 15$

Answer: $f(-5) = 15$

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Read 2 more answers

Mean Value theorem help! BRAINLIEST if you can explain it clearly!!!

Korolek [52]

$\bf f(x)=ln(x-5)\qquad [6,8]\qquad \cfrac{df}{dx}=\cfrac{1}{x-5}\\\\
-----------------------------\\\\
\textit{mean value theorem}\qquad f'(c)=\cfrac{f(b)-f(a)}{b-a}\\\\
-----------------------------\\\\
f'(c)=\cfrac{1}{c-5}\qquad thus\quad \cfrac{1}{c-5}=\cfrac{f(8)-f(6)}{8-6}
\\\\\\
\cfrac{1}{c-5}=\cfrac{ln(3)-ln(1)}{2}\implies \cfrac{1}{c-5}=\cfrac{ln(3)-0}{2}
\\\\\\
\cfrac{2}{ln(3)}=c-5\implies \boxed{\cfrac{2}{ln(3)}+5=c}$