Answer:
Step-by-step explanation:
1.

c+9=±8
either c=8-9=-1
c=-8-9=-17
so c=-1,-17
D
2.
8x^2-3=2
8x^2=5


so A
3.

so D
or
Y=24000-3000x let me know if i’m wrong please
Answer:
x^2+7x+10
Step-by-step explanation:
I am sorry, But I remember seeing this on Quizlet