Question

what is f(-5) if f(x)=|2x-1|+10

a.21
b.19
c.-1
d.-21

Answer 1

\[\Large f(\color{royalblue}{x}) \quad=\quad \left|2(\color{royalblue}{x})-1\right|+10\]

\[\Large f(\color{royalblue}{-5}) \quad=\quad \left|2(\color{royalblue}{-5})-1\right|+10\]
You want to simplify everything inside of the absolute brackets first.
Once you get it down to a single value, the bars are telling you to `change it to a positive number`.

Answer 2

yea I got 11

Answer 3

11 inside the bars? :o

Answer 4

yes

Answer 5

\[\Large f(-5)=|-11|+10 \qquad\to\qquad f(-5)=11+10\]
Yah that looks good! :)

Answer 6

21 so a

Answer 7

yay sirryan \c:/