D=# of tickets sold at the door
a=# of tickets sold in advance
3a+5d=2630
d=a+30
3a+5(a+30)=2630
8a+150=2630
8a=2480
a=310
d=340
310 tickets were sold in advance and 340 tickets were sold at the door.
The answer is 96*5 =480 so nancy will call 480 people in a 5 day workweek
It represents that she tutored for 0 hours, and earned $0.