Toms tunes: $60 per hour. sabrina’s sounds: $100 set up fee plus $40 per hour dj derek: $175 set up fee plus $30 per hours. if the committee has $450 to spend on a dj. for how many hours could each dj play ?

Toms tunes could play for 7.5 hours because 450/60= 7.5
Sabrina's sounds could play for 8.75 hours because 450-100(set up fee)= 350 and 350/40= 8.75
DJ Derek could play for approximately 9.17 hours  because
450-175(set up fee)= 275  and then 275/30= 9.16666667 or approximately 9.17.
Hope this helped you out!