A telephone plan costs $50 per month plus $0.15 per minute of calls made. Another plan costs $44
per month plus $0.20 per minute of calls made.
After how many minutes of calls made in a month
will the cost be the same for both plans?

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9