Evaluate v(w + 3) for v(w) = 2w - 1

Question

campbell_st · Answer

just replace w in the equation v(w) = 2w -1 

with w + 3

so you have 

v(w +3) = 2(w +3) -1

just distribute and simplify for the answer

anonymous · Answer

Say, N=w+3, then v(N)=2N-1. substituting back for w you would then get v(w+3)=2(w+3)-1 =2w+6-1=2w+5

anonymous · Answer

is that the answer ?

anonymous · Answer

v is a function not a variable

hero · Answer

lol, I knew that...

campbell_st · Answer

why, does it change the answer...?

hero · Answer

I can see how one could get confuzzled by it.

anonymous · Answer

in this case v is known as "a function of w". w can take any value. What they are saying here is that for any w we throw in were gonna add 3 to it. so if w was 1 then it would be 4 and so on. You could just call w+3=x and then say v(x)=2x-1, and if you know how to solve systems of equations then x=w+3 you could solve it that way. OR you can just substitute w+3 for w and distribute both will work

anonymous · Answer

okay thanks