Which month could be used as a counterexample for the argument All months have at least 30 days.?

 February is the month that serves as the counterexample.

Step-by-step explanation: February has 28 days most years, 29 days in a leap year. So it is an an example that disproves the statement that all months have at least 30 days.

y > 1/3x

y < = -x + 4

hope this : )

if x = 1, then the answer is 3.5