Question

Help with piece-wise functions please. I am stuck.

Answer 1

Like I what to do. But with this one the numbers only fit into the middle inequality.

Answer 2

Here it is like having 3 different functions for three different domains of x.
To find the value of the function at x = -1 find out which domain applies here and then choose the corresponding function.

Answer 3

f(x) = 12 ONLY for x < -3
f(x) = 15 ONLY IF -3 <= x < 6
f(x) = 20 ONLY for x >= 6

So to find f(x) at x = -1, which domain has x = -1?

Answer 4

the 2nd one

Answer 5

I believe so does it not?

Answer 6

Yes. Sorry, I was looking at something else and got distracted.
So choose the corresponding function.

Answer 7

haha

Answer 8

so would it be like f(-1)=15-1?

Answer 9

No. The function that applies when x = -1 is f(x) = 15.
So f(-1) = 15.

Answer 10

ahh so I am confused what you would do after that because it is not 15x or 15+x

Answer 11

Yes it is a independent of x. That means it is a horizontal line in the graph meaning same f(x) value when -3 <= x < 6.

Answer 12

so then that would be 15 would be your final answer would it not?

Answer 13

Yes f(-1) = 15
They also want f(3)

Answer 14

Which is the same is it not?

Answer 15

Yes.

Since there are answers to two questions they want you to separate the answers with a semi-colon as given in the example. So answers it as 15; 15

Answer 16

XD I am an idiot... I have sat here literally for 3 hours... Thinking that was the answer... *facepalm*

Answer 17

Did it accept 15; 15 ?

Answer 18

I will find out in a moment I have 3 more problems

Answer 19

Alright.

Answer 20

I got a 90% We got it right :3 And I got the others right besides one graph

Answer 21

Great! Congrats!