Let f be the function given by f (x) =3x+|4-x| Find and simplify f(5)+[f(-1)]^2

Question

amoodarya · Answer

f (x) =3x+|4-x|
put x=5 in it
then put x=-1 
then 
f(5)+(f(-1))^2

amoodarya · Answer

hint :
f(5)=3*5+|4-5|=15+1=16
now can you go on?

anonymous · Answer

For this question they gave me a answer key. The answer for this question is 20. Can you show me how to get this answer please.

jigglypuff314 · Answer

same concept as amoodarya was getting at :)

f(-1) = 3(-1) + |4 - (-1)|
        = -3 + | 5 |
        = 2
then plug in what you know
f(5) + ( f(-1) )^2
= 16 + (2)^2
= 16 + 4 =

anonymous · Answer

Thank you for your help, Jigglypuff314. Your answer was very clear.