I think it’s a because it says perimeter which means to add up all the sides but I could be wrong. I’m not really sure.
<span>3.08 with a bar on top of the 8</span>
When we say "closed under addition" in the context of rational numbers, we mean to say that when we add up rational numbers then, the sum is also a rational number.
From the given choices above, the one that should the characteristic of being "closed under addition" is only fourth equation. Both 1/2 and 0.5 are rational numbers. On the other hand, 1 is also a rational number.
Your midpoint is (0,-5/2)
$12.40 is the answer
We have 4 months and 12 percent so 4/12 is 1/3, then you divide 12% by 3 and you get 4% 4% is .04 and .04 and then .04 times 310 is 12.4 or 12.30
