could someone help me with this one any help is appreciated thank

let f (x)=x^2 + 6 and g (x) =x+8/x find (g o f) (-7)

a) 384 /7
b) -57/7
c) 295 /49
d) 63/55
its not C i got that one wrong

Question

could someone help me with this one any help is appreciated thank 

let f (x)=x^2 + 6 and g (x) =x+8/x find (g o f) (-7)

a) 384 /7
b) -57/7
c) 295 /49
d) 63/55
its not C i got that one wrong

phi · Answer

(g o f) (-7)

means first figure out f(-7)
 f (x)=x^2 + 6 
f(-7) = (-7)^2 + 6

what do you get if you simplify that ?

phi · Answer

do you know how to figure out
-7* -7 + 6
?

girondasearch · Answer

sorry it's been a long time since i have done calculus i'm getting back into pre calculus that is where they are starting me so i'm trying to refresh my mind

phi · Answer

the arithmetic follows rules  PEDMAS
order of operations are done in the order:  
parens
exponents  (powers)
division/multiply
add/subtract

in this problem (-7)^2 + 6
you do the the -7*-7 first
then you add 6

phi · Answer

once you get a number, you "use" that number in place of x in
g(x) = (x+8)/x

girondasearch · Answer

ok thank you this helps me i don't know why i was road blocking myself big thank you

likeabossssssss · Answer

welcome to os

girondasearch · Answer

thank you very much

likeabossssssss · Answer

np