Which functions have a vertex with a x-value of o? . select three options.
f(x) = |x|
f(x) = \x{ + 3
f(x) = 5x + 31
f(x) = [x] - 6
f(x) = 5x + 31 - 6

Step-by-step explanation:

1) f(x) = |x| has its vertex at (0, 0), so the x-value is 0.

2) Cannot figure out what you meant by  \x{ + 3.

3) f(x) = 5x + 31 has a straight line graph, no vertex.

4)   [x] - 6 does not have a vertex, or at least not a well-defined one like |x|

5)  Unsure of what you meant by 5x + 31 - 6.  Did you mean 5x + 25?  This does not have a vertex.

if you was gonna solve for a, a is a   < -12