given f(x)=|2x-8|, find the value of f(1)-f(2).
a.10
b.6
c.1
d.2

Question

given f(x)=|2x-8|, find the value of f(1)-f(2). 
a.10
b.6
c.1
d.2

mathstudent55 · Answer

To find f(1), replace x with 1 in the expression.

f(1) = |2(1) - 8|

Can you evaluate the right side?

anonymous · Answer

b?

anonymous · Answer

d

mathstudent55 · Answer

I don't know. I'm not guessing an answer. Since you are asking about this problem, I'm trying to help you by breaking it down into steps. I asked you about the first step.

How about answering my question and trying to solve it instead of guessing?

mathstudent55 · Answer

Oh, I see. Perhaps your first answer was an answer to my question.

anonymous · Answer

I'm not guessing. I solved the first step but than solved the second and from there my answer is D.

mathstudent55 · Answer

f(1) = |2(1) - 8|

f(1) = |2 - 8|

f(1) = |-6| = 6

mathstudent55 · Answer

Yes, I think I figured that out.

mathstudent55 · Answer

f(2) = |2(2) - 8|

f(2) = |4 - 8|

f(2) = |-4| = 4

So f(1) - f(2) = 6 - 4 = 2

You are correct.
Sorry about my misunderstanding above.

anonymous · Answer

No sorry on my part and thank you!! I wish my book would break questions down the same way!

mathstudent55 · Answer

If you have any more questions, keep asking questions and following the solutions. They may help you with this. After a while, you'll be able to break down the problem into simple steps.