Answer:
-7x
Step-by-step explanation:
==> -12x + 5x.
==> -12+5xx
==> -7x
So you're initial equation is

. Well since

, plug in 24 for the 1 in

. So

, and

so

.
<span>C = total calories burned
r = rate of burning calories = 420 calories burned/hour
t = time in hours
C = 420 * t
</span>
There are more atoms in a human body because 7.5*10^18 is less than 7*10^27.