Can someone please help me​

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

Which term best describes the association between variables a and b

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"