The sum of two positive integers, a and b, is at least 30. The difference of the two integers is at least 10. If b is the greate
r integer, which system of inequalities could represent the values of a and b?
O a + b 2 30 b2a + 10
O a + b 2 30 bsa - 10
O a + b s 30b2a + 10
O a + b = 30 bsa-10
