Question

@campbell_st

Answer 1

find which part of the function you plug x=4 into then do so

Answer 2

look at the part on the right to see which one to use

Answer 3

well you have to use the 2nd part of the function because the domain of the 1st part is x < 4

so you are looking at

f(x) = x -2

just substitute x =4 for the solution

Answer 4

so substitute all the x's with 4?

Answer 5

well there is only 1 x

f(4) = 4 - 2

Answer 6

4-2= 2, so my final answer would be 2?

Answer 7

thats it... it is determined by the domain to the right of each part of the function

f(x) = 2x + 3 has a domain

\[-10 \le x < 4\]

and

f(x) = x - 2

has a domain

\[4 \le x \le 15\]

because you have 4... you must use the 2nd part because of the domain restrictions.

Answer 8

We did a problem like this before.
Each time you get help on a problem, you should go over it until you understand it, so the next time you see a similar problem you can handle it on your own. That's how you learn. you shouldn't have to ask for help on many problems that are the same type. By studying the problem and understanding it, then you'll be able to answer similar questions in an exam in which you will have no help.

Answer 9

@mathstudent55 I understand what you're saying and I understand it when you explain it, but after that it's very hard to understand the concept.. There are so many variables and rules, sometimes it's just too much..