5a+9b-4. what is
the coefficient

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.

Anyone know? will mark brainliest if you're correct!

What is the range for 31,39,29,34,37,24,36,33,34,28