I dont get this please someone help

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.

Twelve less than a number is at most 20

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c