Answer:
x = 5q - 15
Step-by-step explanation:
![\frac{7}{7q+21}=\frac{x}{5q^{2}-45}\\\\\frac{7}{7(q+3)}=\frac{x}{5 (q^{2} -9)}\\\\frac{1}{q+3}=\frac{x}{5*(q^{2}-3^{2})}\\\\\frac{1}{q+3}=\frac{x}{5(q+3)(q-3)}\\\\\frac{1}{q+3}*5*(q+3)(q-3)=x\\\\5(q-3)=x\\\\x= 5q-15](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B7q%2B21%7D%3D%5Cfrac%7Bx%7D%7B5q%5E%7B2%7D-45%7D%5C%5C%5C%5C%5Cfrac%7B7%7D%7B7%28q%2B3%29%7D%3D%5Cfrac%7Bx%7D%7B5%20%28q%5E%7B2%7D%20-9%29%7D%5C%5C%5C%5Cfrac%7B1%7D%7Bq%2B3%7D%3D%5Cfrac%7Bx%7D%7B5%2A%28q%5E%7B2%7D-3%5E%7B2%7D%29%7D%5C%5C%5C%5C%5Cfrac%7B1%7D%7Bq%2B3%7D%3D%5Cfrac%7Bx%7D%7B5%28q%2B3%29%28q-3%29%7D%5C%5C%5C%5C%5Cfrac%7B1%7D%7Bq%2B3%7D%2A5%2A%28q%2B3%29%28q-3%29%3Dx%5C%5C%5C%5C5%28q-3%29%3Dx%5C%5C%5C%5Cx%3D%205q-15)
![18 \div 4](https://tex.z-dn.net/?f=18%20%5Cdiv%204)
First see what 4 could go by and the answer closest to 18 that is not more than the answer is the first number of the answer.
4×1=4
4×2=8
4×3=12
4×4=16
In this case 4 is the first number of the answer because if you fo 4 by 5 it equals 20 , which is more than the answer
4×5=20
after that , you subtract the answer, 18 minus 16 which is 2 because nothing times 4 equals 2
So the remainder is 2/4 or .50
If you have any questions about this please don't hesitate to ask me
Answer:
n=3
Step-by-step explanation:
Operation used is division
Answer:
D. is your answer
Step-by-step explanation:
![V=whl=7*6.5*7=318.5unit^3](https://tex.z-dn.net/?f=V%3Dwhl%3D7%2A6.5%2A7%3D318.5unit%5E3)