Katlyn takes 20 minutes to walk from her house to the supermarket and back. After stepping outside her house, she takes 1 minute to tie her shoes and 2 minutes to check the route on her phone. How many trips can she take to the supermarket and back in 60 minutes? 20t+3<60 20 t plus 3 less than 60 20t−3≤60 20 t minus 3 less-than-or-equal-to 60 20t+3≥60 20 t plus 3 greater-than-or-equal-to 60 20t+3≤60
To calculate the number of trips she can take, we need to subtract the time she spends tying her shoes and checking her route from the total time she has (60 minutes).
Time spent tying her shoes and checking the route = 1 minute + 2 minutes = 3 minutes
Total time available for trips = 60 minutes - 3 minutes = 57 minutes
Time taken for each trip = 20 minutes (to the supermarket) + 20 minutes (back to her house) = 40 minutes
Number of trips she can take = Total time available for trips / Time taken for each trip = 57 minutes / 40 minutes = 1.425 trips
Since she cannot take a fractional trip, she can take a maximum of 1 trip to the supermarket and back in 60 minutes.