I need help with this ASAP!!

Answer:
45
Step-by-step explanation:
Just plug in 12 wherever "z" is so,
[tex]5^2-\frac{12}{3} +2(12)[/tex] simplify the equation ⇒ [tex]25-4+24[/tex]
25-4=21
21+24=45
subtract and add as needed and finally our answer is
45