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Answer:
26 km
Step-by-step explanation:
Let's assume the number of kilometers Katherine can drive is represented by the variable 'x.' The total cost of renting the car, including the flat fee and the cost per kilometer, can be calculated as follows:
1.25x + 7 ≤ 40
Let's solve
1.25x ≤ 33
x ≤ 26.4
Since x represents the number of kilometers, it cannot be a fraction or a decimal. Therefore, the maximum whole number of kilometers Katherine can drive is 26.