Answer:
192 used stamps.
Step-by-step explanation:
Since the ratio is 4 used stamps for every new stamp, you can count that as 5 stamps total. Then divide 240 by 5 to get 48. Then multiply that by 4 to get 192.
Answer:y=
1
2
x4+
7
x3+
9
x2+
−27
x−27
x= 88
1. ≤ 50
2. ≥ 200
x+7
25x - 6x - 18x + 7
x + 7
