Question

Given the function k described by k(x)= x+4, find the following:
k(0)=?

Answer 1

Just let x=0. So...

k(0)=(0)+4
k(0)=4

And there is your answer :)

Answer 2

Thank you!

Answer 3

k(-1) =?

Answer 4

No problem :)
For k=(-1), its the same idea...

k(-1)=(-1)+4
k(-1)=-1+4
k(-1)=3

Answer 5

k(-13) =?

Answer 6

k(-13)=(-13)+4
k(-13)=-9

Answer 7

Thank you so much!

Answer 8

uh oh...k(12)=?

Answer 9

k(12)=(12)+4
k(12)=16

Answer 10

Whoo Hoo!!!

Answer 11

One more.... k(c+6) = ?

Answer 12

k(c+6)=(c+6)+4
k(c+6)=c+10

Answer 13

In this case you don't get a numerical value, since you are replacing the variable x with another variable.

Answer 14

You were right every time. Damn you are smart!

Answer 15

It's simple substitution :)
You'll probably get the hang of it quickly.