Substitute a time in for t and simplify one of the expressions to be a single number, what does that number (answer) represent? What units does it have? 30t + 25 -20t + 1000
[time] [tank 1 (liters)] [Tank 2 (liters)]
0 25 1000
5 175 900
10 325 800
15 475 700
20 625 600
25 775 500
30 925 400
35 1075 300
40 1225 200
45 1375 100
50 1525 0