Answer:
Explanation:
We can model the cost of a taxi trip with y = 1.25x + 3, where y is the total cost and x is the miles traveled. $1.25 is charged per mile, and the initial $3 is added to find the total cost. We know that the total cost is $18, so we can put 18 in for y and solve for x:
18 = 1.25x + 3
15 = 1.25x (subtracted 3 from both sides)
12 = x (divided each side by 1.25)
So, the trip was 12 miles