I believe that would be vitamin A, because vitamin A generally increases with age.
Hope it helps!
The average adult human body has about 60 billion cells
<span>The correct answer is b. ocean and freshwater system conditions generally remain constant throughout the year. This is not true because they are very different. For examples, freshwater rivers can completely freeze during the winter while oceans can't freeze completely, not even a bit. Also, the animals inside have completely different body structures to fight these changes.</span>
Substitution:
7y=1-10x
-5x-7(1-10x)=4
X=1
-5(1-7y)=4
Y=-9/7
Therefore, your answer would be {1,-9/7}
