Answer:
<h2> 7</h2>
Step-by-step explanation:
![\left(\frac12x+\frac12y\right)^2=\\\\=\left[\frac12(x+y)\right]^2=\\\\=\left(\frac12\right)^2\left(x+y\right)^2=\\\\=\frac14\left(x+y\right)^2=\\\\=\frac14(x^2+2xy+y^2)=\\\\=\frac14(x^2+y^2+2xy)=\\\\=\frac14(14+2\cdot5)=\\\\=\frac14\cdot28=\\\\=7](https://tex.z-dn.net/?f=%5Cleft%28%5Cfrac12x%2B%5Cfrac12y%5Cright%29%5E2%3D%5C%5C%5C%5C%3D%5Cleft%5B%5Cfrac12%28x%2By%29%5Cright%5D%5E2%3D%5C%5C%5C%5C%3D%5Cleft%28%5Cfrac12%5Cright%29%5E2%5Cleft%28x%2By%5Cright%29%5E2%3D%5C%5C%5C%5C%3D%5Cfrac14%5Cleft%28x%2By%5Cright%29%5E2%3D%5C%5C%5C%5C%3D%5Cfrac14%28x%5E2%2B2xy%2By%5E2%29%3D%5C%5C%5C%5C%3D%5Cfrac14%28x%5E2%2By%5E2%2B2xy%29%3D%5C%5C%5C%5C%3D%5Cfrac14%2814%2B2%5Ccdot5%29%3D%5C%5C%5C%5C%3D%5Cfrac14%5Ccdot28%3D%5C%5C%5C%5C%3D7)
The answer is B) 4 : 16
Explanation:
RATIO FOR 1 MOLECULE OF ACETIC ACID:
2 carbon atoms : 2 oxygen atoms : 4 hydrogen atoms
Since its asking how many for 2 MOLECULES, we double the ATOMS (we multiply all by 2)
RATIO FOR 2 MOLECULES OF ACETIC ACID:
4 carbon atoms : 4 oxygen atoms : 8 hydrogen atoms
The question only asks for the ratio of carbon atoms to ALL atoms. To calculate all atoms, we add 4 + 4 + 8 = 16
So if there are 4 carbon atoms and the sum of all atoms is 16, out final ratio answer is:
B.) 4 : 16
Mark me brainliest please!!
Answer:
18 and 65
Step-by-step explanation:
under 18 would be 17 and under, therefore not including 18 year olds. obviously they are not 19 yet either, so they wouldn't fall into either category, therefore they may be unsure of what to answer.
same with 65 year olds; they are more than 64 year old, but not yet /over/ 65, therefore they would not fit into either category either.
