Note: It seems you may have unintentionally missed writing the complete question. As total cost is missing.
So, I am assuming how many tickets Mr. XYZ can buy if he/she pays 80 dollars.
The solution would still clear your concept though.
Answer:
Please check the explanation.
Step-by-step explanation:
We know that the slope-intercept form of the line equation
[tex]y = mx+b[/tex]
where m is the slope or rate of change and b is the y-intercept
Given the function
[tex]c(x) = 18x -10[/tex]
comparing with the slope-intercept form of the line equation
here
Assuming the total cost i.e. c(x) = $80
In order to find the value of x, set [tex]c(x) = 80[/tex]
i.e.
[tex]80 = 18x -10[/tex]
switch sides
[tex]18x - 10 = 80[/tex]
add 10 to both sides
[tex]18x - 10 + 10 = 80 + 10[/tex]
[tex]18x = 90[/tex]
Divide 18 to both sides
[tex]\frac{18x}{18}=\:\frac{90}{18}[/tex]
[tex]x = 5[/tex]
Therefore, we conclude that if you can buy x = 5 if you pay 90 dollars.
