Answer:
a. [tex]x=\frac{C-60}{85}[/tex]
b. 3 and 5 ski trips
Step-by-step explanation:
Given function that shows the total cost for the x trips,
[tex]C=85x+60----(1)[/tex]
a. For solving the above equation for x,
We need to isolate x on the left side of the equation,
From equation (1)
[tex]85x = C - 60[/tex]
[tex]\implies x=\frac{C-60}{85}[/tex]
b. If C = $ 315,
[tex]x=\frac{315-60}{85}[/tex]
[tex]=\frac{255}{85}[/tex]
= 3,
If C = $ 485,
[tex]x=\frac{485-60}{85}[/tex]
[tex]=\frac{425}{85}[/tex]
= 5
