14+2 is 16 for example
Just add 2 until you get to the number of rows you need if you need more help just ask
Answer:
What's the equation first? I always solve for letters like z and x. Look at the equation first deeply in. Like as an example, if it was 9 + z = 21, z =12.
She can make two cakes and 3 trays of cookies
The length of BC = 72
Solution:
Given ΔABC and ΔDEF are similar triangles.
ΔABC
ΔDEF
AB = 54, BC = n, EF = 12, DE = 9
Similar triangle theorem:
If two triangles are similar then the corresponding sides are proportional to each other.
![$\Rightarrow\frac{BC}{EF}=\frac{AB}{DE}](https://tex.z-dn.net/?f=%24%5CRightarrow%5Cfrac%7BBC%7D%7BEF%7D%3D%5Cfrac%7BAB%7D%7BDE%7D)
Substitute the given values, we get
![$\Rightarrow\frac{n}{12}=\frac{54}{9}](https://tex.z-dn.net/?f=%24%5CRightarrow%5Cfrac%7Bn%7D%7B12%7D%3D%5Cfrac%7B54%7D%7B9%7D)
Do cross multiplication.
![$\Rightarrow9\times n=54\times12](https://tex.z-dn.net/?f=%24%5CRightarrow9%5Ctimes%20n%3D54%5Ctimes12)
Divide both sides of the equation by 9.
![$\Rightarrow n=\frac{54\times12}{9}](https://tex.z-dn.net/?f=%24%5CRightarrow%20n%3D%5Cfrac%7B54%5Ctimes12%7D%7B9%7D)
![$\Rightarrow n=6\times12](https://tex.z-dn.net/?f=%24%5CRightarrow%20n%3D6%5Ctimes12)
![$\Rightarrow n=72](https://tex.z-dn.net/?f=%24%5CRightarrow%20n%3D72)
⇒ BC = 72
Option B is the correct answer.
The length of BC = 72.
-13b ^2 + 25b^2 = 25b^2 - 13b^2
25b^2 - 13b^2 = 12b^2
hope this helps