For his exercise today, Kareem plans to both run and swim. Let r be the number of laps he runs and let s be the number of laps he swims. Each lap he runs takes him 5 minutes, and each lap he swims takes him 3 minutes.
He wants to exercise for more than 45 minutes today. Using the values and variables given, write an inequality describing this

Question

For his exercise today, Kareem plans to both run and swim. Let r be the number of laps he runs and let s be the number of laps he swims. Each lap he runs takes him 5 minutes, and each lap he swims takes him 3 minutes.
He wants to exercise for more than 45 minutes today. Using the values and variables given, write an inequality describing this

anonymous · Answer

"He wants to exercise for more than 45 minutes today. " 
means:
exercise time > 45min

# of laps ran times 5 minutes = total time taken to run r number of laps = 5r
# of laps swam times 3 minutes = total time taken to swim s number of laps = 3s

exercise time = 5r + 3s

so
5r+3s > 45