No, according to PEMDAS, that expression would be the same as saying 12+(5*3)-4, not the correct expression: (12+5)*3-4.
Answer:
-1
Step-by-step explanation:

g(x)=0-1=-1
Answer:
112 or 113
Step-by-step explanation:
75%=0.75
450*0.75=337.5
450-337.5=112.5
Or if 75% ride then 25% do not ride the bus.
450*0.25=112.5
Presumably you would round to 113