a. For the variable, p = players. The equation would be c = 45p + 1500.
b. c = 45p + 1500
5460 = 45p + 1500
-1500 on each side,
3960 = 45p
Divide by 45 on each side,
p = 88 players
c. c = (45*80) + 1500
c = 5100
The total cost would be $5,100. If they sold each of the 80 players for $120, the total amount of money they would make in a week would be $9,600.
9,600-5100 = $4,500
So they made a $4,500 profit.
Hope this helps!