5=x/-5+9 || combine like terms (-5+9) || 5=x/4 || multiply by 4 on both sides to get x by itself || (5x4)=x || 20=x
Answer:
we can make some assumptions b/c of the marks. on the sides, the double marks means they are the same, and the single marks are also the same length. because those sides are the same lengths.. we can just add up all the sides to find the length around the shape... or the perimeter of it.
Step-by-step explanation:
I'll start with the 14 on the left, and go counter clock wise
14 + 6 + 9 + 5 + 9 + 7 + 14 + (6+7+5) = Perimeter
the last numbers in the parenthesis are from the sides opposite of the long top side, the parts of the other sides adds up to the long top side... sooo,
Perimeter = 82 ( I added in my head , so use a calculator to double check )
Given that the half-life of the sample is 14.28 days, you are looking for a decay factor
such that
Solving for
yields
Now, after 57 days, you're told that a sample of unknown mass decayed to 55g, which means if
was the starting mass of the sample, then
Solving for
yields
Answer:
1234567891011121314151617181910
Answer:
b. 45
why?
because the diagonal line intersects both AB and CD at the same angle
