Which of these expression equal 15 when x = 1/2 and y = 3

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.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

With finding limits of multi variable !