Which equation are you talking about
I don’t see the pic !
How do write whole numbers without scientific notation? can you elaborate on your question.
Answer:
![\large\boxed{\dfrac{7n}{30}=\dfrac{7}{30}n}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%5Cdfrac%7B7n%7D%7B30%7D%3D%5Cdfrac%7B7%7D%7B30%7Dn%7D)
Step-by-step explanation:
![\dfrac{2n}{5}+\left(-\dfrac{n}{6}\right)=\dfrac{2n}{5}-\dfrac{n}{6}](https://tex.z-dn.net/?f=%5Cdfrac%7B2n%7D%7B5%7D%2B%5Cleft%28-%5Cdfrac%7Bn%7D%7B6%7D%5Cright%29%3D%5Cdfrac%7B2n%7D%7B5%7D-%5Cdfrac%7Bn%7D%7B6%7D)
To subtract both fractions we need a common denominator.
![LCD=(5)(6)=30](https://tex.z-dn.net/?f=LCD%3D%285%29%286%29%3D30)
![\dfrac{2n}{5}=\dfrac{2n\cdot6}{5\cdot6}=\dfrac{12n}{30}\\\\\dfrac{n}{6}=\dfrac{n\cdot5}{6\cdot5}=\dfrac{5n}{30}](https://tex.z-dn.net/?f=%5Cdfrac%7B2n%7D%7B5%7D%3D%5Cdfrac%7B2n%5Ccdot6%7D%7B5%5Ccdot6%7D%3D%5Cdfrac%7B12n%7D%7B30%7D%5C%5C%5C%5C%5Cdfrac%7Bn%7D%7B6%7D%3D%5Cdfrac%7Bn%5Ccdot5%7D%7B6%5Ccdot5%7D%3D%5Cdfrac%7B5n%7D%7B30%7D)
Therfore
![\dfrac{2n}{5}-\dfrac{n}{6}=\dfrac{12n}{30}-\dfrac{5n}{30}=\dfrac{12n-5n}{30}=\dfrac{7n}{30}=\dfrac{7}{30}n](https://tex.z-dn.net/?f=%5Cdfrac%7B2n%7D%7B5%7D-%5Cdfrac%7Bn%7D%7B6%7D%3D%5Cdfrac%7B12n%7D%7B30%7D-%5Cdfrac%7B5n%7D%7B30%7D%3D%5Cdfrac%7B12n-5n%7D%7B30%7D%3D%5Cdfrac%7B7n%7D%7B30%7D%3D%5Cdfrac%7B7%7D%7B30%7Dn)
Answer:
A. 2(x + 9) = 8
Step-by-step explanation:
To solve this problem, we proceed as follows:
- We call "x" the number picked up by Amy:
![x](https://tex.z-dn.net/?f=x)
- Amy then adds 9 to this number, so we get:
![x+9](https://tex.z-dn.net/?f=x%2B9)
- Then, we multiply this sum by 2, so we get:
![2(x+9)](https://tex.z-dn.net/?f=2%28x%2B9%29)
- Finally, Amy says that this number is equal to 8:
![2(x+9)=8](https://tex.z-dn.net/?f=2%28x%2B9%29%3D8)
So the correct equation is
A. 2(x + 9) = 8
We can even solve it to find the number. We get:
![2(x+9)=8\\2x+2\cdot 9 = 8\\2x+18=8\\2x+18-18=8-18\\2x=-10\\x=\frac{-10}{2}=-5](https://tex.z-dn.net/?f=2%28x%2B9%29%3D8%5C%5C2x%2B2%5Ccdot%209%20%3D%208%5C%5C2x%2B18%3D8%5C%5C2x%2B18-18%3D8-18%5C%5C2x%3D-10%5C%5Cx%3D%5Cfrac%7B-10%7D%7B2%7D%3D-5)
The answer would be B) more than one hope this helped you!