Answer:
x = 3 trips
Step-by-step explanation:
Given the cost function, C = 4000x + 500, where C represents the total cost of the trip, and x represents the number of trips:
We can solve for x by substituting the given value for C in the cost function:
C = 4000x + 500
$12,500 = 4000x + 500
Subtract 500 from both sides of the equation:
$12,500 - 500 = 4000x + 500 - 500
$12,000 = 4000x
Divide 4000 on both sides of the equation to solve for x:
[tex]\frac{12000}{4000} = \frac{4000x}{4000}[/tex]
x = 3
Therefore, for a total cost of $12,500, it took 3 trips.