Tanya took a cab from her home to the airport. Her total fare including a tip of $5.00, was $28.50. EZ Cab Company has a pick-up -at-home charge of $2.50, which is not shown on the meter. The cab meter charges $1.00 for the first 0.2 mile and $0.25 for each additional 0.2 mile traveled. With this information, my question is: How much did the cab meter show when Tanya arrived at the airport?
1 answer:
16.2 miles. Since she paid a $5 tip, the cost for her fare was $23.50. Let x be the number of 0.2-mile increments in the trip: 23.50 = 2.50 + 1 + 0.25(x-1) This equation comes from the 2.50 home pick-up fee; $1 for the first 0.2-mile increment; and 0.25 for each other 0.2-mile increment. Using the distributive property, we have: 23.50 = 2.50 + 1 + 0.25*x - 0.25*1 23.50 = 2.50 + 1 + 0.25x - 0.25 Combining like terms, 23.50 = 0.25x + 2.75 Subtracting 2.75 from both sides, we have: 23.50 - 2.75 = 0.25x + 2.75 - 2.75 20.25 = 0.25x Dividing both sides by 0.25, we have: 20.25/0.25 = 0.25x/0.25 81 = x This means there are 81 0.2-mile increments in her trip. 81(0.2) = 16.2 miles
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