Find the following values for the given functions.
f(x)=x+4, g(x)=x^2
a) (f+g)(4)
b) (f-g)(4)
c) (fg)(4)
d) (f/g)(4)
Explain this to me I dont get it

Question

Find the following values for the given functions. 
f(x)=x+4, g(x)=x^2
a) (f+g)(4)
b) (f-g)(4)
c) (fg)(4)
d) (f/g)(4)
Explain this to me I dont get it

uri · Answer

All those mean are add the two functions, subtract the two, multiply the two, and divide the two. 

a) (x+4) + (x^2)
b) (x+4) - (x^2)
c) (x+4)(x^2)
d) (x+4)/(x^2)

Just plug in 4 for x in all four of those and simplify

nsh4267 · Answer

is that it? I thought it was more difficult then that

uri · Answer

That's it. Like for the multiplication as an example:
(4+4)*(4^2)
(8)*(16) = 128

Just do the same thing with the other questions.

nsh4267 · Answer

ok how about this one. f(x)=-x^2, g(x)=6x-9
(f/g)(2)

nsh4267 · Answer

I got -1.333333333

uri · Answer

-(2)^2/(6*2-9)
-4/3
Id keep it a fraction, but -1.3333 is right.

nsh4267 · Answer

changed it back to a fraction and it worked

uri · Answer

Good job