Answer:
-2
I think it's -2 because you're dividing x by 2 so you'd divide -4 by 2.
Answer:
0ppppppppppppppppppppppppppp
Answer:
c
Step-by-step explanation:
the formula is
When we plug that in we get 
Hope this helps!
Answer:
Option D doesn't make any sense.
Step-by-step explanation:
D) 7 hours of sleep correspond to an age of 19 years.
That is wrong.
If we use the expression provided
hours = 8 + 0.5*(18 -age)
hours = 8 + 0.5*(18 -19)
hours = 8 + 0.5*(-1)
hours = 7.5