Answer:
B ![(f-g) (x)= \sqrt{\frac{x} {8} } -\frac{2}{x} +6](https://tex.z-dn.net/?f=%28f-g%29%20%28x%29%3D%20%5Csqrt%7B%5Cfrac%7Bx%7D%20%7B8%7D%20%7D%20-%5Cfrac%7B2%7D%7Bx%7D%20%2B6)
Step-by-step explanation:
------------------(1)
-----------------------(2)
Subtracting eq (2) from eq (1)
![f-g= \sqrt{\frac{x} {8} } +11 - (5+\frac{2}{x} )](https://tex.z-dn.net/?f=f-g%3D%20%5Csqrt%7B%5Cfrac%7Bx%7D%20%7B8%7D%20%7D%20%2B11%20-%20%285%2B%5Cfrac%7B2%7D%7Bx%7D%20%29)
![f-g= \sqrt{\frac{x} {8} } +11 - 5 -\frac{2}{x}](https://tex.z-dn.net/?f=f-g%3D%20%5Csqrt%7B%5Cfrac%7Bx%7D%20%7B8%7D%20%7D%20%2B11%20-%205%20-%5Cfrac%7B2%7D%7Bx%7D)
![f-g= \sqrt{\frac{x} {8} } -\frac{2}{x} +6](https://tex.z-dn.net/?f=f-g%3D%20%5Csqrt%7B%5Cfrac%7Bx%7D%20%7B8%7D%20%7D%20-%5Cfrac%7B2%7D%7Bx%7D%20%2B6)
Answer:
![\frac{6}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B6%7D%7B7%7D)
Step-by-step explanation:
SInce she used
of it we will divide
by ![\frac{1}{6}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B6%7D)
![\frac{1}{7}/ \frac{1}{6}=\frac{6}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B7%7D%2F%20%5Cfrac%7B1%7D%7B6%7D%3D%5Cfrac%7B6%7D%7B7%7D)
the answer to your question is n = -2
8.5x + 55 = 123
You would use the formula: mx + b = y
The slope is the amount of money each day(mx),and the y-intercept would be the fee(b) and the total cost would be y.