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

230 + m less-than or equal to 500

Step-by-step explanation:

230 + m ≤ 500- this inequality determines how many minutes can be used

correct answer option

i dont know it

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.