Answer:
Step-by-step explanation:
1. Current cost
2. New plan's cost
- $94 + $4.50 per device ⇒ 94 + 4.5x
3. Number of devices, x, for which the cost of the new plan is less than the cost of the current plan
4. Solve the inequality
- Subtract 94 from both sides:
4.5 x < 175 - 94
4.5x < 81
- Divide both sides by 4.5:
x < 18
5. Answer: x < 18
The cost of the new plan is less than the cost of the current plan when the number of devices is less than 18; this is, maximum 17 devices.