Question

A mobile phone carrier charges an extra fee if a customer uses more than 500 minutes each month. Tom has already used 230 minutes this month. Which inequality can be used to determine how many more minutes Tom can use this month without going over the 500-minute limit?
230 + m greater-than 500
230 + m greater-than-or-equal-to 500
230 + m less-than 500
230 + m less-than-or-equal-to 500

Answer 1

230 + m less-than-or-equal-to 500

Because "without going over" means the total minutes can be at most 500, so 230 + m ≤ 500.