Subscription fee: $100 (one-time cost) Unlimited Data Cost: $40 per line per month
Unlimited Call Cost: $10 per line per month
Unlimited Text Message Cost: $10 per line per month
Cost of Phone: $300 per line
The total cost for a 6-month plan for n lines is represented by the expression below.

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

How do i do this? i don’t understand