7. which if the following is always true of odd functions?

i. f (−x) = −f(x)
ii. f(|x|) is even
iii. |f(x)| is even

a. all of these are true.
b. none of these are true.
c. i only.
d. ii only.
e. i and iii only.

What is the missing step in this proof ?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Which of the following contains a variable?