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

Answer 1

"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